private boolean parseLambdaExpression(final boolean oldTest) {
    SyntaxTreeBuilder.Marker expr = myBuilder.mark();
    myBuilder.advanceLexer();
    getFunctionParser().parseParameterListContents(PyTokenTypes.COLON, false, true);
    boolean parseExpressionResult = oldTest ? parseOldTestExpression() : parseSingleExpression(false);
    if (!parseExpressionResult) {
      myBuilder.error(message("PARSE.expected.expression"));
    }
    expr.done(PyElementTypes.LAMBDA_EXPRESSION);
    return true;
  }
private boolean parseLambdaExpression(final boolean oldTest)