private static FSRL getFSRLFromParent(GFileSystem fs, GFile parent, String path) {
		FSRL parentFSRL = (parent != null) ? parent.getFSRL() : fs.getFSRL();
		return parentFSRL.appendPath(path);
	}
Creates a FSRL for a file based on the either the filesystem's FSRLRoot or parent
directory's FSRL, preferring a parent directory over the filesystem's FSRL.

@param fs {@link GFileSystem}
@param parent {@link GFile} parent directory, null ok
@param path string path to assign to the FSRL
@return new {@link FSRL}
Ghidra/Features/Base/src/main/java/ghidra/formats/gfilesystem/GFileImpl.java