@Override
	public boolean isValidValue(String value) {
		return value == null || value.isBlank();
	}
A BSimFilterType that represents a non-specified filter. Used for the gui so that when adding
a filter it doesn't have to default to some specific filter.
Ghidra/Features/BSim/src/main/java/ghidra/features/bsim/gui/filters/BlankBSimFilterType.java