text: export default Ext.define("ExtReactMaterialUIExamples.reader.Salary", {
      extend: "Ext.data.reader.Json",
  
      alias: "reader.salary",
  
      getResponseData: function (...args) {
          const data = KitchenSink.reader.Salary.superclass.getResponseData.call(
              this,
              ...args
          );
          return this.addTreeHierarchy(data);
      },
  
      addTreeHierarchy: function (data) {
          data = this.addTreeLevel(
              data,
              "industry_type",
              ["salary", "state"],
              "industry"
          );
          return this.addTreeLevel(data, "state", [], "state");
      },
  
      addTreeLevel: function (data, fieldName, fieldsToCopy, notBlank) {
          var tree = [],
              currentValue,
              parentItem;
  
          Ext.Array.each(data, function (item) {
              if (item[fieldName] != currentValue) {
                  currentValue = item[fieldName];
                  parentItem = {};
                  parentItem[fieldName] = currentValue;
                  parentItem.text = currentValue;
                  Ext.Array.each(fieldsToCopy, function (field) {
                      parentItem[field] = item[field];
                  });
                  parentItem.children = [];
                  tree.push(Ext.apply(parentItem));
              }
              if (item[notBlank]) {
                  if (Ext.isEmpty(item.children)) {
                      item.leaf = true;
                  }
                  if (Ext.isEmpty(item.text)) {
                      item.text = item[notBlank];
                  }
                  tree[tree.length - 1].children.push(item);
              }
          });
  
          return tree;
      },
  });
  