code: def _is_binary(feature_values):
      return np.all(
          np.logical_or(feature_values == 0, feature_values == 1)
      ) or np.min(feature_values) == np.max(feature_values)
  
imports: import numpy
label_desc: Use image node_id 2 for calling a global function with example usage: _is_binary(feature_values) and returns: unknown