code: def compute_mask(self, inputs, mask=None):
      if not self.mask_zero:
          return None
      return ops.not_equal(inputs, 0)
  
imports: import numpy
  import keras
  from keras import ops
  from keras import layers
label_desc: Use image node_id 4 for calling the CustomEmbedding obj's underlying member method code with example usage: obj.compute_mask(inputs, mask) and returns: ops, None