function getAccessorByteStride(gltf, accessor) {
  const bufferViewId = accessor.bufferView;
  if (defined(bufferViewId)) {
    const bufferView = gltf.bufferViews[bufferViewId];
    if (defined(bufferView.byteStride) && bufferView.byteStride > 0) {
      return bufferView.byteStride;
    }
  }
  return (
    ComponentDatatype.getSizeInBytes(accessor.componentType) *
    numberOfComponentsForType(accessor.type)
  );
}
Returns the byte stride of the provided accessor.
If the byteStride is 0, it is calculated based on type and componentType

@param {object} gltf A javascript object containing a glTF asset.
@param {object} accessor The accessor.
@returns {number} The byte stride of the accessor.

@private