class_docstr: Scope can't be mixed with names and ids.
  Scope with name should have length exactly 1.
  Scope with ids should have length exactly 1.
code: def empty(self) -> "ScopeMatcher":
      self._names = None
      self._ids = None
      return self
  
imports: from typing import TypeVar, Generic, Optional, List, Union
  from lets_plot.geo_data.gis.geometry import GeoRect, GeoPoint
  from lets_plot.geo_data.geocodes import _ensure_is_list
  from lets_plot.geo_data.gis.request import Request, GeocodingRequest, RegionQuery, MapRegion, AmbiguityResolver, PayloadKind, MapRegionKind, IgnoringStrategyKind, LevelKind
label_desc: Use image node_id 4 for calling the ScopeMatcher obj's underlying member method code with example usage: obj.empty() and returns: self