add a go file to top level to make it go get-able
add a go file to top level to make it go get-able

Neil-Ni/v2,Staffjoy/v2,Staffjoy/v2,Neil-Ni/v2,Neil-Ni/v2,Staffjoy/v2,Neil-Ni/v2,Staffjoy/v2,Neil-Ni/v2,Staffjoy/v2