@SuppressWarnings("unchecked")
	public static <T> PcodeUseropLibrary<T> nil() {
		return (PcodeUseropLibrary<T>) NIL;
	}
The empty userop library, cast to match parameter types.

@param <T> the type required by the executor
@return the empty userop library
Ghidra/Framework/Emulation/src/main/java/ghidra/pcode/exec/PcodeUseropLibrary.java