open fun <P, S, O, R> onRender(renderProps: P, renderState: S, context: BaseRenderContext<P, S, O>, proceed: (P, S, WorkflowInterceptor.RenderContextInterceptor<P, S, O>?) -> R, session: WorkflowInterceptor.WorkflowSession): R(source) Intercepts calls to StatefulWorkflow.render.