Function rest_node_service_get_proposal_participation 

async fn rest_node_service_get_proposal_participation<S>(
    __arg0: State<Arc<S>>,
    headers: HeaderMap,
    __arg2: Query<GetProposalParticipationRequest>,
) -> Result<Json<ParticipationResponse>, RestError>
where
    S: NodeService + Send + Sync + 'static,

GetProposalParticipation - JSON endpoint.

GET /v2/node/participation/proposal