PyFile:GeneratorInArgumentList.py
  PyExpressionStatement
    PyCallExpression: "".join
      PyReferenceExpression: join
        PyStringLiteralExpression: 
          PsiElement(Py:SINGLE_QUOTED_STRING)('""')
        PsiElement(Py:DOT)('.')
        PsiElement(Py:IDENTIFIER)('join')
      PyArgumentList
        PsiElement(Py:LPAR)('(')
        PyGeneratorExpression
          PyStringLiteralExpression:  
            PsiElement(Py:SINGLE_QUOTED_STRING)('' '')
          PsiWhiteSpace(' ')
          PsiElement(Py:FOR_KEYWORD)('for')
          PsiWhiteSpace(' ')
          PyTargetExpression: ca
            PsiElement(Py:IDENTIFIER)('ca')
          PsiWhiteSpace(' ')
          PsiElement(Py:IN_KEYWORD)('in')
          PsiWhiteSpace(' ')
          PyReferenceExpression: comment
            PsiElement(Py:IDENTIFIER)('comment')
        PsiElement(Py:RPAR)(')')