docs: def do_symbols_matching(self):
          """
          Performs symbols matching.
          """
          self._clear_decorations()
          current_block = self.editor.textCursor().block()
          data = get_block_symbol_data(self.editor, current_block)
          pos = self.editor.textCursor().block().position()
          for symbol in [PAREN, SQUARE, BRACE]:
              self._match(symbol, data, pos)