class_docstr: wapper of metric 
code: def __init__(self, config):
      self.config = config
      self.pos_label = config["pos_label"]
  
imports: import os
  import abc
  from absl import logging
  import numpy
  from sklearn import metrics
  from seqeval.metrics import classification_report
  from delta.utils.register import registers
  from delta.utils.postprocess.postprocess_utils import ids_to_sentences
  from rouge import FilesRouge
  from sacrebleu import corpus_bleu
  from delta.utils.metrics import metric_utils
label_desc: Use image node_id 1 to create a new Metric object from inherited base classes: ABCMetric with example: obj = Metric(config)