class_docstr: Lazily import a module, mainly to avoid pulling in large dependencies.
  This allows them to only be loaded when they are used.
code: def __dir__(self):
      module = self._load()
      return dir(module)
  
imports: import importlib
  import types
label_desc: Use image node_id 4 for calling the LazyLoader obj's underlying member method code with example usage: obj.__dir__() and returns: dir