Open Thread::state() that returns *mut lua_State pointer.

Author: khvzak

src/thread.rs

@@ -92,7 +92,6 @@ pub struct AsyncThread<R> {
 
 impl Thread {
     /// Returns reference to the Lua state that this thread is associated with.
-    #[doc(hidden)]
     #[inline(always)]
     pub fn state(&self) -> *mut ffi::lua_State {
         self.1