It now compiles.

src/main/java/dan200/computercraft/api/lua/ILuaObject.java

@@ -0,0 +1,21 @@
+/*
+ * This file is part of the public ComputerCraft API - http://www.computercraft.info
+ * Copyright Daniel Ratcliffe, 2011-2019. This API may be redistributed unmodified and in full only.
+ * For help using the API, and posting your mods, visit the forums at computercraft.info.
+ */
+
+package dan200.computercraft.api.lua;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+import dan200.computercraft.api.peripheral.IComputerAccess;
+import dan200.computercraft.api.peripheral.IPeripheral;
+
+public interface ILuaObject {
+    @Nonnull
+    String[] getMethodNames();
+
+    @Nullable
+    Object[] callMethod(@Nonnull ILuaContext context, int method, @Nonnull Object[] arguments) throws LuaException, InterruptedException;
+}