PyFile:TypeParameterListInFunctionDeclaration.py
  PyFunction('foo')
    PsiElement(Py:DEF_KEYWORD)('def')
    PsiWhiteSpace(' ')
    PsiElement(Py:IDENTIFIER)('foo')
    PyTypeParameterList
      PsiElement(Py:LBRACKET)('[')
      PyTypeParameter
        PsiElement(Py:IDENTIFIER)('T')
      PsiElement(Py:RBRACKET)(']')
    PyParameterList
      PsiElement(Py:LPAR)('(')
      PyNamedParameter('a')
        PsiElement(Py:IDENTIFIER)('a')
      PsiElement(Py:RPAR)(')')
    PsiElement(Py:COLON)(':')
    PsiWhiteSpace(' ')
    PyStatementList
      PyPassStatement
        PsiElement(Py:PASS_KEYWORD)('pass')