beginCompilationUnit(class)
  beginMetadataStar(class)
  endMetadataStar(0)
  beginClassOrNamedMixinApplicationPrelude(class)
    handleIdentifier(A, classOrMixinDeclaration)
    handleNoTypeVariables({)
    beginClassDeclaration(class, null, A)
      handleNoType(A)
      handleClassExtends(null)
      handleClassNoWithClause()
      handleClassOrMixinImplements(null, 0)
      handleClassHeader(class, class, null)
      beginClassOrMixinBody(DeclarationKind.Class, {)
        beginMetadataStar(operator)
        endMetadataStar(0)
        beginMember()
          beginMethod(null, null, null, null, null, operator)
            handleNoType({)
            handleOperatorName(operator, [])
            handleNoTypeVariables(()
            beginFormalParameters((, MemberKind.NonStaticMethod)
              beginMetadataStar(int)
              endMetadataStar(0)
              beginFormalParameter(int, MemberKind.NonStaticMethod, null, null, null)
                handleIdentifier(int, typeReference)
                handleNoTypeArguments(index)
                handleType(int, null)
                handleIdentifier(index, formalParameterDeclaration)
                handleFormalParameterWithoutValue())
              endFormalParameter(null, null, index, null, null, FormalParameterKind.mandatory, MemberKind.NonStaticMethod)
            endFormalParameters(1, (, ), MemberKind.NonStaticMethod)
            handleNoInitializers()
            handleAsyncModifier(null, null)
            handleIdentifier(index, expression)
            handleNoTypeArguments(;)
            handleNoArguments(;)
            handleSend(index, ;)
            handleExpressionFunctionBody(=>, ;)
          endClassMethod(null, operator, (, null, ;)
        endMember()
      endClassOrMixinBody(DeclarationKind.Class, 1, {, })
    endClassDeclaration(class, })
  endTopLevelDeclaration(main)
  beginMetadataStar(main)
  endMetadataStar(0)
  beginTopLevelMember(main)
    beginTopLevelMethod(}, null)
      handleNoType(})
      handleIdentifier(main, topLevelFunctionDeclaration)
      handleNoTypeVariables(()
      beginFormalParameters((, MemberKind.TopLevelMethod)
      endFormalParameters(0, (, ), MemberKind.TopLevelMethod)
      handleAsyncModifier(null, null)
      beginBlockFunctionBody({)
        beginMetadataStar(A)
        endMetadataStar(0)
        handleIdentifier(A, typeReference)
        handleNoTypeArguments(?)
        handleType(A, ?)
        beginVariablesDeclaration(a, null, null)
          handleIdentifier(a, localVariableDeclaration)
          beginInitializedIdentifier(a)
            beginVariableInitializer(=)
              handleLiteralNull(null)
            endVariableInitializer(=)
          endInitializedIdentifier(a)
        endVariablesDeclaration(1, ;)
        handleIdentifier(a, expression)
        handleNoTypeArguments(!)
        handleNoArguments(!)
        handleSend(a, !)
        handleNonNullAssertExpression(!)
        handleIdentifier(toString, expressionContinuation)
        handleNoTypeArguments(()
        beginArguments(()
        endArguments(0, (, ))
        handleSend(toString, ;)
        endBinaryExpression(?.)
        handleExpressionStatement(;)
        handleIdentifier(a, expression)
        handleNoTypeArguments(!)
        handleNoArguments(!)
        handleSend(a, !)
        handleNonNullAssertExpression(!)
        handleLiteralInt(42)
        handleIndexedExpression(null, ?.[, ])
        handleExpressionStatement(;)
      endBlockFunctionBody(3, {, })
    endTopLevelMethod(main, null, })
  endTopLevelDeclaration()
endCompilationUnit(2, )