/** Single return value version of: {@link #glGetDoublei_v GetDoublei_v} */
 public static double glGetDoublei(int target, int index) {
   APIBuffer __buffer = apiBuffer();
   int data = __buffer.doubleParam();
   nglGetDoublei_v(target, index, __buffer.address(data));
   return __buffer.doubleValue(data);
 }