FGizmoVec2ParameterChange

Various implementations of [IGizmoVec2ParameterSource](API\Runtime\InteractiveToolsFramework\IGizmoVec2ParameterSource)[FGizmoVec2ParameterChange](API\Runtime\InteractiveToolsFramework\FGizmoVec2ParameterChange) represents a change in the value of an [IGizmoVec2ParameterSource](API\Runtime\InteractiveToolsFramework\IGizmoVec2ParameterSource).