code: def size(self):
      return self._shape[0] * self._shape[1]
  
file_path: ivy/ivy/functional/frontends/numpy/matrix/methods.py
imports: import ivy
  from ivy.functional.frontends.numpy import argmax, any, ndarray
label_desc: Use image node_id 12 for calling the matrix obj's underlying member method code with example usage: obj.size() and returns: unknown