protected void overrideColor(String lafId, String sytemId) {
		String normalizedId = javaIdToNormalizedId.get(lafId);
		if (normalizedId == null) {
			Msg.debug(this, "Missing value for laf id: \"" + lafId);
			return;
		}
		normalizedValues.addColor(new ColorValue(normalizedId, sytemId));
	}
When putting {@link GColorUIResource} values into the UiDefaults, we need to make sure
we use the same instance for the same color. Some LookAndFeels do "==" checks on colors
when updating UI values.
@param cache the cache of shared {@link GColorUIResource}s
@param id the id we are creating a shared GColorUIResource for
@return a GColorUIResource such that only one instance for a given id exists.
Ghidra/Framework/Gui/src/main/java/generic/theme/laf/UiDefaultsMapper.java