Save the configuration of selective mocking

[Cryrivers]

Is your feature request related to a problem? Please describe.

looks good, but can we do it further, save the configuration somewhere? It might be troublesome if someday there are a lot of API mocking available but you only need to test some of them

• Jennie (2018)

Describe the solution you'd like
A potential solution is saving those configuration into snapshots. So we don't have to add more command line option or new mechanism for users to learn.

Describe alternatives you've considered
N/A

Additional context
N/A

[JennieJi]

Agree. I think this is the most straight forward and quick solution for now.