Arrange all the text in this text frame to fit inside its extents by
        setting auto size off, wrap on, and setting the font of all its text
        to *font_family*, *font_size*, *is_bold*, and *is_italic*.

def _apply_fit(self, font_family, font_size, is_bold, is_italic):
        """
        Arrange all the text in this text frame to fit inside its extents by
        setting auto size off, wrap on, and setting the font of all its text
        to *font_family*, *font_size*, *is_bold*, and *is_italic*.
        """
        self.auto_size = MSO_AUTO_SIZE.NONE
        self.word_wrap = True
        self._set_font(font_family, font_size, is_bold, is_italic)