def check_starts_with_this(self, function, docstring):
        """D404: First word of the docstring should not be `This`.

        Docstrings should use short, simple language. They should not begin
        with "This class is [..]" or "This module contains [..]".

        """
        if docstring:
            first_word = ast.literal_eval(docstring).split()[0]
            if first_word.lower() == 'this':
                return violations.D404()
D404: First word of the docstring should not be `This`.

        Docstrings should use short, simple language. They should not begin
        with "This class is [..]" or "This module contains [..]".