pragma Favor_Top_Level (type_NAME);
The argument of pragma Favor_Top_Level must be a named access-to-subprogram type. This pragma is an efficiency hint to the compiler, regarding the use of ’Access or ’Unrestricted_Access on nested (non-library-level) subprograms. The pragma means that nested subprograms are not used with this type, or are rare, so that the generated code should be efficient in the top-level case. When this pragma is used, dynamically generated trampolines may be used on some targets for nested subprograms. See restriction No_Implicit_Dynamic_Code.