code: def query_names(self, name, like, kind):
          
          kind = self._make_kind_id(kind)
          sql = 'select id, name from files ' \
                'where leaf_name {} ?'.format('like' if like else '=')
          args = (name,)
          if like:
              sql += ' escape ?'
              args = (name, '\\')
          logging.debug('%s %s', sql, args)
          self.cursor.execute(sql, args)
          ids = self.cursor.fetchall()
          files = []
          for file_id, header in ids:
              sql = 'select name from code_items ' \
                    'where file_id = ?'
              args = (file_id,)
              if kind:
                  sql += 'and kind = ?'
                  args = (file_id, kind)
              logging.debug('%s %s', sql, args)
              self.cursor.execute(sql, args)
              files.append((header, self.cursor.fetchall()))
          return files
docs: Query function declarations in the files.