TypeRepresentation:a.pythonTypeRepresentation
  PyParenthesizedExpression
    PsiElement(Py:LPAR)('(')
    PyLambdaExpression
      PsiElement(Py:LAMBDA_KEYWORD)('lambda')
      PyParameterList
        <empty list>
      PsiElement(Py:COLON)(':')
      PsiWhiteSpace(' ')
      PyNumericLiteralExpression
        PsiElement(Py:INTEGER_LITERAL)('42')
    PsiErrorElement:')' expected
      <empty list>