public void addStyleModifier(int newStyle) {
		if (style == null) {
			style = newStyle;
			return;
		}
		if (style == Font.PLAIN || newStyle == Font.PLAIN) {
			throw new IllegalStateException("Attempted to set incompable styles");
		}
		style = style | newStyle;
	}
Sets the font style modifier. This can be called multiple times to bold and italicize.
@param newStyle the style to use for the font.
Ghidra/Framework/Gui/src/main/java/generic/theme/FontModifier.java