[FEATURE] Allow deserializing request class that have required path parameters

[Xtansia]

Is your feature request related to a problem?

Currently it is impossible to deserialize a request class from JSON when it has required path parameters as they will not be set and a missing property exception will be thrown.

What solution would you like?

A mechanism to pass additional context into the deserialization that can carry the path parameter values separately to the JSON blob.

What alternatives have you considered?

Deserializing the path params out of the JSON blob.