error[E04001]: restricted visibility
   ┌─ tests/move_check/typing/module_call_internal.move:10:9
   │
 4 │     fun foo() {}
   │         --- This function is internal to its module. Only 'public' and 'public(friend)' functions can be called outside of their module
   ·
10 │         X::foo()
   │         ^^^^^^^^ Invalid call to '0x2::X::foo'