code: def get_fields(brain_or_object):
      
      obj = get_object(brain_or_object)
      # The portal object has no schema
      if is_root(obj):
          return {}
      schema = get_schema(obj)
      if is_dexterity_content(obj):
          names = schema.names()
          fields = map(lambda name: schema.get(name), names)
          schema_fields = dict(zip(names, fields))
          # update with behavior fields
          schema_fields.update(get_behaviors(obj))
          return schema_fields
      return dict(zip(schema.keys(), schema.fields()))
docs: Get the list of fields from the object
  
      :param brain_or_object: A single catalog brain or content object
      :type brain_or_object: ATContentType/DexterityContentType/CatalogBrain
      :returns: List of fields
      :rtype: list