$ go get -v github.com/jban332/kin-openapi/openapi3
github.com/jban332/kin-openapi/jsoninfo
# github.com/jban332/kin-openapi/jsoninfo
../../jban332/kin-openapi/jsoninfo/marshal.go:158:36: typeInfo.Extensions undefined (type *TypeInfo has no field or method Extensions)
../../jban332/kin-openapi/jsoninfo/unmarshal.go:125:36: typeInfo.Extensions undefined (type *TypeInfo has no field or method Extensions)```