Bug 283676 [FieldAssist] ControlDecoration should add @noextend API tooling tag
SSIA
bundles/org.eclipse.jface/src/org/eclipse/jface/fieldassist/ControlDecoration.java
}
		/*
		 * Return whether or not the hover (shell) is visible.
		 */
		boolean isVisible() {
			return hoverShell.isVisible();
		}
		/*
		 * Compute the extent of the hover for the current text.
		 */
		Point getExtent() {
			GC gc = new GC(hoverShell);
			Point e = gc.textExtent(text);
			gc.dispose();
			e.x += hm * 2;
			e.y += hm * 2;
			return e;
		}
		/*
		 * Compute a new shape for the hover shell.
		 */
		void setNewShape() {
			Region oldRegion = region;
			region = new Region();
			region.add(getPolygon(false));
			hoverShell.setRegion(region);
			if (oldRegion != null) {
				oldRegion.dispose();
			}
		}