class_docstr: Base class for all theme elements
docstr: Element as string
docstr_tok: ["Element","as","string"]
code: def __str__(self) -> str:
      """
      Element as string
      """
      d = self.properties.copy()
      del d["visible"]
      return f"{d}"
  
imports: from __future__ import annotations
  from typing import TYPE_CHECKING
label_desc: Use image node_id 3 for calling the element_base obj's underlying member method code with example usage: obj.__str__() and returns: d