api: add getConvexHull to GroundObject

runelite-api/src/main/java/net/runelite/api/GroundObject.java

@@ -24,10 +24,20 @@
  */
 package net.runelite.api;
 
+import java.awt.Shape;
+
 /**
  * Represents an object on the ground of a tile.
  */
 public interface GroundObject extends TileObject
 {
 	Renderable getRenderable();
+
+	/**
+	 * Gets the convex hull of the objects model.
+	 *
+	 * @return the convex hull
+	 * @see net.runelite.api.model.Jarvis
+	 */
+	Shape getConvexHull();
 }