public boolean hasValidFilters() {
		for (FilterWidget filter : filterWidgets) {
			if (!filter.isBlank() && !filter.hasValidValue()) {
				return false;
			}
		}
		return true;
	}
Returns true the panel has only valid filters. (Blank filter is ok)
@return true the panel has only valid filters
Ghidra/Features/BSim/src/main/java/ghidra/features/bsim/gui/search/dialog/BSimFilterPanel.java