rl-api: expose cache getters

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

@@ -420,6 +420,11 @@ public interface Client extends GameEngine
 	 */
 	IndexDataBase getIndexConfig();
 
+	/**
+	 * Gets an index by id
+	 */
+	IndexDataBase getIndex(int id);
+
 	/**
 	 * Returns the x-axis base coordinate.
 	 * <p>

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

@@ -40,4 +40,6 @@ public interface IndexDataBase
 	 * @return
 	 */
 	int[] getFileIds(int archiveId);
+
+	byte[] loadData(int archiveID, int fileID);
 }