class_docstr: Record of the values of multiple executions of all metrics.
  
  It contains `MetricHistory` instances for the metrics.
  
  Args:
      metrics: List of strings of the names of the metrics.
class_docstr_tok: ["Record","of","the","values","of","multiple","executions","of","all","metrics",".","It","contains","`","MetricHistory","`","instances","for","the","metrics",".","Args",":","metrics",":","List","of","strings","of","the","names","of","the","metrics","."]
code: def from_config(cls, config):
      instance = cls()
      instance.metrics = {
          name: MetricHistory.from_config(metric_history)
          for name, metric_history in config["metrics"].items()
      }
      return instance
  
imports: import inspect
  import numpy
  import six
  from keras_tuner import protos
  from keras_tuner.api_export import keras_tuner_export
  from keras_tuner.backend import keras
label_desc: Use image node_id 14 for calling the MetricsTracker obj's underlying member method code with example usage: obj.from_config(cls, config) and returns: instance