findRecord( store, type, id, snapshot ) {
		const url = this.buildURL( type, null, snapshot, "findRecord" );
		const paramName = this.findIdParam || store.serializerFor( type.modelName ).primaryKey;
		const data = {
			[ paramName ]: id
		};

		return this.ajax( url, "GET", { data } );
	}
@param {DS.Store} store
@param {DS.Model} type
@param {string} id
@param {DS.Snapshot} snapshot
@return {Promise}