class_docstr: An instance trait which coerces a dict to an instance.
  
  This lets the instance be specified as a dict, which is used
  to initialize the instance.
  
  Also, we default to a trivial instance, even if args and kwargs
  is not specified.
code: def make_dynamic_default(self):
      return self.klass(
          *(self.default_args or ()), **(self.default_kwargs or {})
      )
  
imports: import re
  import traitlets
  import datetime
  from .util import string_types
label_desc: Use image node_id 2 for calling the InstanceDict obj's underlying member method code with example usage: obj.make_dynamic_default() and returns: self