class_docstr: Mathematics domain.
code: def equations(self) -> dict[str, tuple[str, int]]:
      return self.data.setdefault("objects", {})
  
imports: from __future__ import annotations
  from typing import TYPE_CHECKING, Any
  from docutils import nodes
  from docutils.nodes import Element, Node, make_id, system_message
  from sphinx.domains import Domain
  from sphinx.locale import __
  from sphinx.roles import XRefRole
  from sphinx.util import logging
  from sphinx.util.nodes import make_refnode
label_desc: Use image node_id 1 for calling the MathDomain obj's underlying member method code with example usage: obj.equations() and returns: self