OV.Element = class { constructor () { this.name = ''; } GetName () { return this.name; } SetName (name) { this.name = name; } VertexCount () { return 0; } NormalCount () { return 0; } TextureUVCount () { return 0; } TriangleCount () { return 0; } EnumerateVertices (onVertex) { } EnumerateTriangles (onTriangle) { } };