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var serviceLayersRequest = esri.request({   url: "http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Petroleum/KSPetro/MapServer/layers",  // change to your url   content: { f: "json" },   handleAs: "json",   callbackParamName: "callback" }); serviceLayersRequest.then(   function(response) {     console.log("Success: ", response.layers);     console.log("Success: ", response.tables); }, function(error) {     console.log("Error: ", error.message); });var serviceLayersRequest = esri.request({   url: "http://sampleserver3.arcgisonline.com/ArcGIS/rest/services/Petroleum/KSPetro/MapServer/layers",  // change to your url   content: { f: "json" },   handleAs: "json",   callbackParamName: "callback" }); serviceLayersRequest.then(   function(response) {     console.log("Success: ", response.layers);     console.log("Success: ", response.tables); }, function(error) {     console.log("Error: ", error.message); });