class_docstr: Service schema handler 
class_docstr_tok: ["Service","schema","handler"]
code: def _get_schema_references(self, s):
      refs = set()
      if isinstance(s, dict):
          for k, v in s.items():
              if isinstance(v, six.string_types):
                  m = self.__jsonschema_ref_ex.match(v)
                  if m:
                      refs.add(m.group(1))
                  continue
              elif k in ("oneOf", "anyOf") and isinstance(v, list):
                  refs.update(*map(self._get_schema_references, v))
              refs.update(self._get_schema_references(v))
      return refs
  
imports: import itertools
  import re
  import attr
  import six
  from ...utilities.pyhocon import ConfigTree
  from .action import Action
label_desc: Use image node_id 11 for calling the Service obj's underlying member method code with example usage: obj._get_schema_references(s) and returns: refs