private void parseDelStatement() {
    assertCurrentToken(PyTokenTypes.DEL_KEYWORD);
    final SyntaxTreeBuilder.Marker delStatement = myBuilder.mark();
    myBuilder.advanceLexer();
    if (!getExpressionParser().parseSingleExpression(false)) {
      myBuilder.error(PyParsingBundle.message("PARSE.expected.expression"));
    }
    while (myBuilder.getTokenType() == PyTokenTypes.COMMA) {
      myBuilder.advanceLexer();
      if (!getEndOfStatementsTokens().contains(myBuilder.getTokenType())) {
        if (!getExpressionParser().parseSingleExpression(false)) {
          myBuilder.error(PyParsingBundle.message("PARSE.expected.expression"));
        }
      }
    }

    checkEndOfStatement();
    delStatement.done(PyElementTypes.DEL_STATEMENT);
  }
private void parseDelStatement()