code: def rpc_get_usages(self, filename, source, offset):
          
          line, column = pos_to_linecol(source, offset)
          uses = run_with_debug(jedi, 'usages',
                                source=source, line=line, column=column,
                                path=filename, encoding='utf-8')
          if uses is None:
              return None
          result = []
          for use in uses:
              if use.module_path == filename:
                  offset = linecol_to_pos(source, use.line, use.column)
              elif use.module_path is not None:
                  with open(use.module_path) as f:
                      text = f.read()
                  offset = linecol_to_pos(text, use.line, use.column)
  
              result.append({"name": use.name,
                             "filename": use.module_path,
                             "offset": offset})
  
          return result
docs: Return the uses of the symbol at offset.
  
          Returns a list of occurrences of the symbol, as dicts with the
          fields name, filename, and offset.