at the same time. For example, the following code defines a new
`FusedFullyConnected` op, which have `MatMul`, `Add` and some
`activation function` (specified by an op attribute) fused.


```python
import tensorflow as tf

@Composite(
    'FusedFullyConnected',
    inputs=['input_: T', 'filter_: T', 'bias: T'],
    attrs=['act: {"", "RELU", "RELU6", "TANH"} = ""'],