keras/src/layers/regularization/gaussian_noise.py/GaussianNoise/call
class GaussianNoise:    def call(self, inputs, training=False):
        if training and self.stddev > 0:
            return inputs + backend.random.normal(
                shape=ops.shape(inputs),
                mean=0.0,
                stddev=self.stddev,
                dtype=self.compute_dtype,
                seed=self.seed_generator,
            )
        return inputs