code: static URLSpec getReleaseDownloadUrl(String path, MavenSettings settings) throws IOException {
  		String url = settings.mCentralUrl;
  		if (settings.mMirrorUrl != null) url = settings.mMirrorUrl;
  		return new URLSpec(url + path, settings.mProxyHost, settings.mProxyPort);
  	}
docs: get release download URL