code: def is_dict(t):
      if t is None:
          return False
      return get_type_info(t).name == "dict"
  
file_path: coremltools/coremltools/converters/mil/mil/types/type_dict.py
imports: from .None import type_bool, type_int
  from .annotate import annotate
  from .get_type_info import get_type_info
  from .type_spec import Type
  from .type_void import void
label_desc: Use image node_id 3 for calling a global function with example usage: is_dict(t) and returns: unknown, False