def append_help(self, html):
    field_help = (self.field_help or None)
    if field_help:
        help_html = render_template_file('bootstrap4/field_help_text.html', context={'field': self.field, 'field_help': field_help, 'layout': self.layout, 'show_help': self.show_help})
        html += help_html
    return html
def append_help(self, html):
    field_help = (self.field_help or None)
    if field_help:
        help_html = render_template_file('bootstrap4/field_help_text.html', context={'field': self.field, 'field_help': field_help, 'layout': self.layout, 'show_help': self.show_help})
        html += help_html
    return html