code: def __delitem__(self, item):
      self.remove(item)
  
imports: from pyrsistent._checked_types import InvariantException, CheckedType, _restore_pickle, store_invariants
  from pyrsistent._field_common import set_fields, check_type, is_field_ignore_extra_complaint, PFIELD_NO_INITIAL, serialize, check_global_invariants
  from pyrsistent._transformations import transform
label_desc: Use image node_id 6 for calling the _PClassEvolver obj's underlying member method code with example usage: obj.__delitem__(item) without return types