setPartsLibraryPath( path ) {

		this.partsLibraryPath = path;
		return this;

	}
This method must be called prior to `load()` unless the model to load does not reference
library parts (usually it will be a model with all its parts packed in a single file).

@param {string} path - Path to library parts files to load referenced parts from.
This is different from Loader.setPath, which indicates the path to load the main asset from.
@return {LDrawLoader} A reference to this loader.