REST
url: "/OData.svc/Root/Content('IT')",type: 'PATCH',data: "models=[" + JSON.stringify({'AllowedChildTypes': ['ImageLibrary','DocumentLibrary','TaskList']}) + "]",
url: "/OData.svc/Root/Content('IT')",type: 'PATCH',data: "models=[" + JSON.stringify({'AllowedChildTypes': ['ImageLibrary','DocumentLibrary','TaskList']}) + "]",