code: function ( relationships, deformerNodes ) {
  
  			var rawBones = [];
  
  			relationships.children.forEach( function ( child ) {
  
  				var boneNode = deformerNodes[ child.ID ];
  
  				if ( boneNode.attrType !== 'Cluster' ) return;
  
  				var rawBone = {
  
  					ID: child.ID,
  					indices: [],
  					weights: [],
  					transform: new THREE.Matrix4().fromArray( boneNode.Transform.a ),
  					transformLink: new THREE.Matrix4().fromArray( boneNode.TransformLink.a ),
  					linkMode: boneNode.Mode,
  
  				};
  
  				if ( 'Indexes' in boneNode ) {
  
  					rawBone.indices = boneNode.Indexes.a;
  					rawBone.weights = boneNode.Weights.a;
  
  				}
  
  				rawBones.push( rawBone );
  
  			} );
  
  			return {
  
  				rawBones: rawBones,
  				bones: []
  
  			};
  
  		}
docs: Parse single nodes in FBXTree.Objects.Deformer The top level skeleton node has type 'Skin' and sub nodes have type 'Cluster' Each skin node represents a skeleton and each cluster node represents a bone