class_docstr: Stores child ModelBlessing, ModelInfraBlessing, ModelPush for a Model.
class_docstr_tok: ["Stores","child","ModelBlessing",",","ModelInfraBlessing",",","ModelPush","for","a","Model","."]
code: def __init__(self):
      self.model_blessing_by_artifact_id = {}
      self.infra_blessing_by_artifact_id = {}
      self.model_push_by_artifact_id = {}
  
imports: import collections
  import enum
  from typing import Dict
  from tfx import types
  from tfx.dsl.input_resolution import resolver_op
  from tfx.dsl.input_resolution.ops import ops_utils
  from tfx.orchestration.portable.input_resolution import exceptions
  from tfx.orchestration.portable.mlmd import event_lib
  from tfx.orchestration.portable.mlmd import filter_query_builder
  from tfx.types import artifact_utils
  from tfx.utils import typing_utils
  from ml_metadata.proto import metadata_store_pb2
  from ml_metadata.tools.mlmd_resolver import metadata_resolver
label_desc: Use image node_id 1 to create a new ModelRelations object  with example: obj = ModelRelations()