loadAnimation( url, object, onLoad, onProgress, onError ) {

			const builder = this.animationBuilder;
			this.loadVMD( url, function ( vmd ) {

				onLoad( object.isCamera ? builder.buildCameraAnimation( vmd ) : builder.build( vmd, object ) );

			}, onProgress, onError );

		}
Loads Motion file(s) (.vmd) as a THREE.AnimationClip.
If two or more files are specified, they'll be merged.

@param {string|Array<string>} url - url(s) to animation(.vmd) file(s)
@param {SkinnedMesh|THREE.Camera} object - tracks will be fitting to this object
@param {function} onLoad
@param {function} onProgress
@param {function} onError