code: def fastrcnn_2fc_head(feature):
      
      dim = cfg.FPN.FRCNN_FC_HEAD_DIM
      init = tf.variance_scaling_initializer()
      hidden = FullyConnected('fc6', feature, dim, kernel_initializer=init, activation=tf.nn.relu)
      hidden = FullyConnected('fc7', hidden, dim, kernel_initializer=init, activation=tf.nn.relu)
      return hidden
docs: Args:
          feature (any shape):
  
      Returns:
          2D head feature