loadBufferView( bufferViewIndex ) {

    		const bufferViewDef = this.json.bufferViews[ bufferViewIndex ];

    		return this.getDependency( 'buffer', bufferViewDef.buffer ).then( function ( buffer ) {

    			const byteLength = bufferViewDef.byteLength || 0;
    			const byteOffset = bufferViewDef.byteOffset || 0;
    			return buffer.slice( byteOffset, byteOffset + byteLength );

    		} );

    	}
Specification: https://github.com/KhronosGroup/glTF/blob/master/specification/2.0/README.md#buffers-and-buffer-views
@param {number} bufferViewIndex
@return {Promise<ArrayBuffer>}