code: def ascii_tree(self, no_types: bool = False, val_count: bool = False) -> str:
          
          return self.schema._ascii_tree("", no_types, val_count)
docs: Generate ASCII art representation of the schema tree.
  
          Args:
              no_types: Suppress output of data type info.
              val_count: Show accumulated validation counts.
  
          Returns:
              String with the ASCII tree.