public int getHeight() {
		return height;
	}
Returns the custom icon height specified in {@link #FlatSVGIcon(String, int, int)},
{@link #FlatSVGIcon(String, int, int, ClassLoader)} or {@link #derive(int, int)}.
Otherwise {@code -1} is returned.
<p>
To get the painted icon height, use {@link #getIconHeight()}.

@since 1.2
flatlaf-extras/src/main/java/com/formdev/flatlaf/extras/FlatSVGIcon.java