code: def _accuracy(self):
      self.accuracy = masked_accuracy(
          self.outputs,
          self.placeholders["labels"],
          self.placeholders["labels_mask"],
      )
  
imports: from .layers import *
  from .metrics import *
label_desc: Use image node_id 3 for calling the GCN obj's underlying member method code with example usage: obj._accuracy() without return types