Creates a dataset that asynchronously prefetches elements from input_dataset.

input_dataset A Tensor of type variant.
buffer_size A Tensor of type int64. The maximum number of elements to buffer in an iterator over this dataset.
output_types A list of tf.DTypes that has length >= 1.
output_shapes A list of shapes (each a tf.TensorShape or list of ints) that has length >= 1.
slack_period An optional int. Defaults to 0.
legacy_autotune An optional bool. Defaults to True.
name A name for the operation (optional).

A Tensor of type variant.