Added some jsdoc comments as context.

Author: NicholasMata

showcaseviewlib/src/main/java/smartdevelop/ir/eram/showcaseviewlib/Targetable.java

@@ -4,6 +4,17 @@
 import android.graphics.RectF;
 
 public interface Targetable {
+    /**
+     * This path will be used when drawing the guide.
+     * @return The path that will be drawn.
+     */
     Path guidePath();
+
+    /**
+     * This rect is used when displaying the guide message.
+     * If the guidePath is a circle then the bounding box should
+     * be a square that contains the circle inside of it.
+     * @return The rect that will used for positioning guide message.
+     */
     RectF boundingRect();
 }