ESQ Async Client Side

Hello community,

I'm using isDetailEnabled method in client side to remove add button in detail based on specific conditions. For users in "System Administrator" role I want to allow the add button for every detail. 

 JSCODE:

isDetailEnabled: function(detailName) {
    			var esq =  Ext.create("Terrasoft.EntitySchemaQuery", {
						rootSchemaName: "SysUserInRole"
				});
				esq.addColumn("SysRole");
				// add filter for current user
				esq.filters.add("UserFilter", Terrasoft.createColumnFilterWithParameter(
					Terrasoft.ComparisonType.EQUAL, "SysUser", Terrasoft.SysValue.CURRENT_USER.value
				));
				// add filter for role name, joining to SysRole (which is where the name is stored)
				esq.filters.add("RoleFilter", Terrasoft.createColumnFilterWithParameter(
					Terrasoft.ComparisonType.EQUAL, "SysRole.Id", "83a43ebc-f36b-1410-298d-001e8c82bcad" 
				));
               esq.getEntityCollection(function(result) {
                        if (result.success && result.collection.getItems().length > 0) {
                              return true;
                        }
                       return false;
               });
                return this.callParent(arguments);
}