code: def __call__(self, X: gpflow.base.TensorType) -> tf.Tensor:
      return tf.sin(X)
  
file_path: GPflow/doc/sphinx/notebooks/getting_started/mean_functions.pct.py
imports: import os
  import warnings
  import matplotlib.pyplot
  import numpy
  import tensorflow
  from check_shapes import inherit_check_shapes
  import gpflow
label_desc: Use image node_id 1 for calling the SineMeanFunction obj's underlying member method code with example usage: obj.__call__(X) and returns: tf