def find_types(self, site=None, match=r'<STR_LIT>'):
self._find_paths()<EOL>types = [tag for (site_, tag) in self.paths if site in (None, site_)]<EOL>if match is not None:<EOL><INDENT>match = re.compile(match)<EOL>return list(filter(match.search, types))<EOL><DEDENT>return types<EOL>
Return the list of known data types.

        This is just the basename of each FFL file found in the
        FFL directory (minus the ``.ffl`` extension)