def iter_previewers(self, previewers=None):
if self.entry_point_group is not None:<EOL><INDENT>self.load_entry_point_group(self.entry_point_group)<EOL>self.entry_point_group = None<EOL><DEDENT>previewers = previewers orself.app.config.get('<STR_LIT>', [])<EOL>for item in previewers:<EOL><INDENT>if item in self.previewers:<EOL><INDENT>yield self.previewers[item]<EOL><DEDENT><DEDENT>
Get previewers ordered by PREVIEWER_PREVIEWERS_ORDER.