Kendo UI, Grid "Toolbar" with Typescript - kendo-ui

Question

I am using Kendo UI's Grid system for a data grid, and am migrating my code to Typescript. I am loving it so far, but have hit a few snags; One of which is that the declaration for the grid seems to be a bit incomplete, even with Telerik's official Typescript definitions.
For example, this code works in javascript. However if I run this exact same code in Typescript, I am told that the toolbar property is invalid, because it is expecting a type of GridToolbarItem. I have traced GridToolbarItem down and, while I do find the interface for it, I cannot seem to actually declare or create it, thus I am not being allowed to create a toolbar for my grid!
elements.grid = $('#grid').kendoGrid({
dataSource: {
transport: {
read: {
url: "/administrator/data/items",
dataType: "json",
type: 'GET',
cache: false
}
},
schema: {
total: "total",
data: "data"
},
page: 0,
pageSize: 15,
take: 15,
serverPaging: true,
serverFiltering: true,
type: "aspnetmvc-ajax"
},
toolbar: kendo.template($("#search-byName").html()),
pageable: {
refresh: true,
pageSizes: true
},
selectable: "row",
columns: [
{
field: "Id",
width: 25,
title: "Identity"
},
{
field: "Name",
width: 40,
title: "Name",
template: "<div class='#: Quality.CSS #'>#: Name #</div><div>#: (Origin.Label != null) ? Origin.Label : '' #</div>"
}
],
change: function (e) {
// do some stuff when an item is selected
},
}).data("kendoGrid");

Answer 1

TypeScript's type system is different from that of Java or C# in that it's the shape of the type that matters, not the names in the class hierarchy. I like to think of it as a contract. The contract says you have to have certain things and it doesn't matter why you have them or if you have more.
Here's a lame example I cooked up:
interface BagOfStuff {
anum: number;
astring: string;
anany: any;
}
function processBag(bag: BagOfStuff): void { }
var aBag = {
anum: 5,
astring: "foo",
anany: {},
bonusThing: "bar"
};
processBag(aBag); // works
aBag never said it was of type BagOfStuff, but it satisfies all the requirements of one so I can pass it into processBag and that will work.