api: Interface instead of type

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

@@ -30,6 +30,7 @@ import java.util.EnumSet;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Map;
+import java.util.Set;
 import javax.annotation.Nullable;
 import net.runelite.api.coords.LocalPoint;
 import net.runelite.api.coords.WorldPoint;
@@ -1677,7 +1678,7 @@ public interface Client extends GameShell
 	/**
 	 * Set spells excluded from above hiding
 	 */
-	void setUnhiddenCasts(HashSet<String> casts);
+	void setUnhiddenCasts(Set<String> casts);
 	
 	/**
 	 * Sorts the current menu entries in the same way the client does this.