api/extjs/browser-part/e-br-content.js
function doesStoreContainField(store, fieldName) {
      var model = store.first();
      if (typeof model.get(fieldName) !== 'undefined') {
        return true;
      }
      return model.getField(fieldName) != null;
    }
function doesStoreContainField(store, fieldName) {
      var model = store.first();
      if (typeof model.get(fieldName) !== 'undefined') {
        return true;
      }
      return model.getField(fieldName) != null;
    }
function doesStoreContainField ( store , fieldName ) { var model = store . first ( ) ; if ( typeof model . get ( fieldName ) !== 'undefined' ) { return true ; } return model . getField ( fieldName ) != null ; }
Store must contain at least one record.
Store must contain at least one record .