Looks at line 'i' to see if the line matches a module member def.

def _match_member(self, i, column):
        """Looks at line 'i' to see if the line matches a module member def."""
        self.col_match = self.RE_MEMBERS.match(self._source[i])
        if self.col_match is not None:
            if column < self._source[i].index(":"):
                self.el_call = "name"
            else:
                self.el_call = "assign"
            
            return True
        else:
            return False