code: def _match_type(self, i):
          
          self.col_match = self.RE_TYPE.match(self._source[i])
          if self.col_match is not None:
              self.section = "types"
              self.el_type = CustomType
              self.el_name = self.col_match.group("name")
             
              return True
          else:
              return False
docs: Looks at line 'i' to see if the line matches a module user type def.