code: def softplus(x):
      """Softplus activation function.
  
      It is defined as: `softplus(x) = log(exp(x) + 1)`.
  
      Args:
          x: Input tensor.
      """
      return ops.softplus(x)
  
imports: from keras import backend
  from keras import ops
  from keras.api_export import keras_export
label_desc: Use image node_id 7 for calling a global function with example usage: softplus(x) and returns: ops