define([
        '../../Core/Check',
        '../../Core/defineProperties',
        '../Cesium3DTilesInspector/Cesium3DTilesInspector'
    ], function(
        Check,
        defineProperties,
        Cesium3DTilesInspector) {
    'use strict';

    /**
     * A mixin which adds the {@link Cesium3DTilesInspector} widget to the {@link Viewer} widget.
     * Rather than being called directly, this function is normally passed as
     * a parameter to {@link Viewer#extend}, as shown in the example below.
     * @exports viewerCesium3DTilesInspectorMixin
     *
     * @param {Viewer} viewer The viewer instance.
     *
     * @example
     * var viewer = new Cesium.Viewer('cesiumContainer');
     * viewer.extend(Cesium.viewerCesium3DTilesInspectorMixin);
     */
    function viewerCesium3DTilesInspectorMixin(viewer) {
        //>>includeStart('debug', pragmas.debug);
        Check.typeOf.object('viewer', viewer);
        //>>includeEnd('debug');

        var container = document.createElement('div');
        container.className = 'cesium-viewer-cesium3DTilesInspectorContainer';
        viewer.container.appendChild(container);
        var cesium3DTilesInspector = new Cesium3DTilesInspector(container, viewer.scene);

        defineProperties(viewer, {
            cesium3DTilesInspector : {
                get : function() {
                    return cesium3DTilesInspector;
                }
            }
        });
    }

    return viewerCesium3DTilesInspectorMixin;
});