Started work on upgrading to 1.16.1. Not in a compilable state yet

remappedSrc/dan200/computercraft/api/lua/ILuaTask.java

@@ -0,0 +1,33 @@
+/*
+ * 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.Nullable;
+
+/**
+ * A task which can be executed via {@link ILuaContext#executeMainThreadTask(ILuaTask)} or
+ * {@link ILuaContext#issueMainThreadTask(ILuaTask)}. This will be run on the main thread, at the beginning of the
+ * next tick.
+ *
+ * @see ILuaContext#executeMainThreadTask(ILuaTask)
+ * @see ILuaContext#issueMainThreadTask(ILuaTask)
+ */
+@FunctionalInterface
+public interface ILuaTask
+{
+    /**
+     * Execute this task.
+     *
+     * @return The arguments to add to the {@code task_completed} event. These will be returned by
+     * {@link ILuaContext#executeMainThreadTask(ILuaTask)}.
+     * @throws LuaException If you throw any exception from this function, a lua error will be raised with the
+     *                      same message as your exception. Use this to throw appropriate errors if the wrong
+     *                      arguments are supplied to your method.
+     */
+    @Nullable
+    Object[] execute() throws LuaException;
+}