public JavaPropertyValue getProperty(String id) {
		return propertyMap.get(id);
	}
Returns the current {@link JavaPropertyValue} for the given id or null if none exists.
@param id the id to look up a icon for
@return the current {@link JavaPropertyValue} for the given id or null if none exists.
Ghidra/Framework/Gui/src/main/java/generic/theme/GThemeValueMap.java