class_docstr: Metric object.
class_docstr_tok: ["Metric","object","."]
code: def from_proto(cls, proto):
      return cls(proto.key, proto.value, proto.timestamp, proto.step)
  
file_path: mlflow/mlflow/entities/metric.py
imports: from mlflow.entities._mlflow_object import _MLflowObject
  from mlflow.protos.service_pb2 import Metric
label_desc: Use image node_id 7 for calling the Metric obj's underlying member method code with example usage: obj.from_proto(cls, proto) and returns: cls