beginCompilationUnit(f)
  beginMetadataStar(f)
  endMetadataStar(0)
  beginTopLevelMember(f)
    beginTopLevelMethod(, null)
      handleNoType()
      handleIdentifier(f, topLevelFunctionDeclaration)
      handleNoTypeVariables(()
      beginFormalParameters((, MemberKind.TopLevelMethod)
      endFormalParameters(0, (, ), MemberKind.TopLevelMethod)
      handleAsyncModifier(null, null)
      beginBlockFunctionBody({)
        beginMetadataStar(var)
        endMetadataStar(0)
        handleNoType(var)
        beginVariablesDeclaration(a, null, var)
          handleIdentifier(a, localVariableDeclaration)
          beginInitializedIdentifier(a)
            handleNoVariableInitializer(a)
          endInitializedIdentifier(a)
        endVariablesDeclaration(1, ;)
        beginReturnStatement(return)
          handleIdentifier(a, expression)
          handleNoTypeArguments(!=)
          handleNoArguments(!=)
          handleSend(a, !=)
          beginBinaryExpression(!=)
            handleLiteralNull(null)
          endBinaryExpression(!=)
          beginConditionalExpression(?)
            handleNoTypeArguments([)
            handleIdentifier(a, expression)
            handleNoTypeArguments(])
            handleNoArguments(])
            handleSend(a, ])
            handleLiteralList(1, [, null, ])
            handleConditionalExpressionColon()
            beginConstLiteral([])
              handleNoTypeArguments([])
              handleLiteralList(0, [, const, ])
            endConstLiteral(;)
          endConditionalExpression(?, :)
        endReturnStatement(true, return, ;)
      endBlockFunctionBody(2, {, })
    endTopLevelMethod(f, null, })
  endTopLevelDeclaration()
endCompilationUnit(1, )