PyFile:KeywordAsNamedParameter.py
  PyFunction('f')
    PsiElement(Py:DEF_KEYWORD)('def')
    PsiWhiteSpace(' ')
    PsiElement(Py:IDENTIFIER)('f')
    PyParameterList
      PsiElement(Py:LPAR)('(')
      PsiErrorElement:Formal parameter name expected
        PsiElement(Py:FROM_KEYWORD)('from')
        PsiElement(Py:EQ)('=')
        PsiElement(Py:INTEGER_LITERAL)('1')
      PsiElement(Py:COMMA)(',')
      PsiWhiteSpace(' ')
      PyNamedParameter('another_one')
        PsiElement(Py:IDENTIFIER)('another_one')
        PsiElement(Py:EQ)('=')
        PyNumericLiteralExpression
          PsiElement(Py:INTEGER_LITERAL)('2')
      PsiElement(Py:RPAR)(')')
    PsiElement(Py:COLON)(':')
    PsiWhiteSpace('\n    ')
    PyStatementList
      PyPassStatement
        PsiElement(Py:PASS_KEYWORD)('pass')