private void filter(String f) {
			if (f == null) {
				filterType = NO_FILTER;
			}
			else {
				if (f.length() > 1 && f.startsWith("\"") && f.endsWith("\"")) {
					filterType = EQUALS_FILTER;
					filter = f.substring(1, f.length() - 1);
				}
				else if (f.startsWith("\"")) {
					filterType = STARTS_WITH_FILTER;
					filter = f.substring(1, f.length());
				}
				else if (f.endsWith("\"")) {
					filterType = ENDS_WITH_FILTER;
					filter = f.substring(0, f.length() - 1);
				}
				else {
					filterType = CONTAINS_FILTER;
					filter = f;
				}
				filter = filter.toLowerCase();
			}
			filter();
		}
Select the highest priority language being displayed.
If more than one language has the highest priority, then the first
one will be used.
Ghidra/Features/Base/src/main/java/ghidra/app/util/bean/SelectLanguagePanel.java