parseUnit(test)
  skipErrorTokens(test)
  listener: beginCompilationUnit(test)
  syntheticPreviousToken(test)
  parseTopLevelDeclarationImpl(, DirectiveContext(DirectiveState.Unknown))
    parseMetadataStar()
      listener: beginMetadataStar(test)
      listener: endMetadataStar(0)
    parseTopLevelMemberImpl()
      listener: beginTopLevelMember(test)
      isReservedKeyword(()
      parseTopLevelMethod(, null, null, , NoType(), null, test, false)
        listener: beginTopLevelMethod(, null, null)
        listener: handleNoType()
        ensureIdentifierPotentiallyRecovered(, topLevelFunctionDeclaration, false)
          listener: handleIdentifier(test, topLevelFunctionDeclaration)
        parseMethodTypeVar(test)
          listener: handleNoTypeVariables(()
        parseGetterOrFormalParameters(test, test, false, MemberKind.TopLevelMethod)
          parseFormalParameters(test, MemberKind.TopLevelMethod)
            parseFormalParametersRest((, MemberKind.TopLevelMethod)
              listener: beginFormalParameters((, MemberKind.TopLevelMethod)
              parseFormalParameter((, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
                parseMetadataStar(()
                  listener: beginMetadataStar(dynamic)
                  listener: endMetadataStar(0)
                listener: beginFormalParameter(dynamic, MemberKind.TopLevelMethod, null, null, null)
                listener: handleIdentifier(dynamic, typeReference)
                listener: handleNoTypeArguments(x)
                listener: handleType(dynamic, null)
                ensureIdentifier(dynamic, formalParameterDeclaration)
                  listener: handleIdentifier(x, formalParameterDeclaration)
                listener: handleFormalParameterWithoutValue())
                listener: endFormalParameter(null, null, null, x, null, null, FormalParameterKind.requiredPositional, MemberKind.TopLevelMethod)
              listener: endFormalParameters(1, (, ), MemberKind.TopLevelMethod)
        parseAsyncModifierOpt())
          listener: handleAsyncModifier(null, null)
          inPlainSync()
        parseFunctionBody(), false, false)
          listener: beginBlockFunctionBody({)
          notEofOrValue(}, switch)
          parseStatement({)
            parseStatementX({)
              parseSwitchStatement({)
                listener: beginSwitchStatement(switch)
                ensureParenthesizedCondition(switch, allowCase: false)
                  parseExpressionInParenthesisRest((, allowCase: false)
                    parseExpression(()
                      looksLikeOuterPatternEquals(()
                        skipOuterPattern(()
                          skipObjectPatternRest(x)
                      parsePrecedenceExpression((, 1, true, ConstantPatternContext.none)
                        parseUnaryExpression((, true, ConstantPatternContext.none)
                          parsePrimary((, expression, ConstantPatternContext.none)
                            parseSendOrFunctionLiteral((, expression, ConstantPatternContext.none)
                              parseSend((, expression, ConstantPatternContext.none)
                                isNextIdentifier(()
                                ensureIdentifier((, expression)
                                  listener: handleIdentifier(x, expression)
                                listener: handleNoTypeArguments())
                                parseArgumentsOpt(x)
                                  listener: handleNoArguments())
                                listener: handleSend(x, ))
                    ensureCloseParen(x, ()
                    listener: handleParenthesizedCondition((, null, null)
                parseSwitchBlock())
                  ensureBlock(), BlockKind(switch statement))
                  listener: beginSwitchBlock({)
                  notEofOrValue(}, case)
                  peekPastLabels(case)
                  listener: beginCaseExpression(case)
                  parsePattern(case, PatternContext.matching, precedence: 1)
                    listener: beginPattern(case)
                    parsePrimaryPattern(case, PatternContext.matching)
                      listener: beginConstantPattern(const)
                      parsePrecedenceExpression(const, 7, false, ConstantPatternContext.explicit)
                        parseUnaryExpression(const, false, ConstantPatternContext.explicit)
                          parsePrimary(const, expression, ConstantPatternContext.explicit)
                            parseLiteralListSetMapOrFunction(const, null)
                              listener: beginTypeArguments(<)
                              listener: handleIdentifier(int, typeReference)
                              listener: handleNoTypeArguments(,)
                              listener: handleType(int, null)
                              listener: handleIdentifier(int, typeReference)
                              listener: handleNoTypeArguments(>)
                              listener: handleType(int, null)
                              listener: endTypeArguments(2, <, >)
                              parseLiteralSetOrMapSuffix(>, null)
                                parseExpression({)
                                  looksLikeOuterPatternEquals({)
                                    skipOuterPattern({)
                                  parsePrecedenceExpression({, 1, true, ConstantPatternContext.none)
                                    parseUnaryExpression({, true, ConstantPatternContext.none)
                                      parsePrimary({, expression, ConstantPatternContext.none)
                                        parseLiteralInt({)
                                          listener: handleLiteralInt(1)
                                parseExpression(:)
                                  looksLikeOuterPatternEquals(:)
                                    skipOuterPattern(:)
                                  parsePrecedenceExpression(:, 1, true, ConstantPatternContext.none)
                                    parseUnaryExpression(:, true, ConstantPatternContext.none)
                                      parsePrimary(:, expression, ConstantPatternContext.none)
                                        parseLiteralInt(:)
                                          listener: handleLiteralInt(2)
                                listener: handleLiteralMapEntry(:, })
                                listener: handleLiteralSetOrMap(1, {, null, }, false)
                      listener: endConstantPattern(const)
                    listener: handleNullCheckPattern(?)
                    listener: endPattern(?)
                  listener: handleSwitchCaseNoWhenClause(?)
                  ensureColon(?)
                  listener: endCaseExpression(case, null, :)
                  peekPastLabels(break)
                  parseStatementsInSwitchCase(:, break, case, 0, 1, null, null)
                    listener: beginSwitchCase(0, 1, case)
                    parseStatement(:)
                      parseStatementX(:)
                        parseBreakStatement(:)
                          isBreakAllowed()
                          ensureSemicolon(break)
                          listener: handleBreakStatement(false, break, ;)
                    peekPastLabels(})
                    listener: endSwitchCase(0, 1, null, null, 1, case, ;)
                  notEofOrValue(}, })
                  listener: endSwitchBlock(1, {, })
                listener: endSwitchStatement(switch, })
          notEofOrValue(}, })
          listener: endBlockFunctionBody(1, {, })
        listener: endTopLevelMethod(test, null, })
  listener: endTopLevelDeclaration(})
  reportAllErrorTokens(test)
  listener: endCompilationUnit(1, )