The main documentation of the Get_Version_Multi_Mesh Procedure contains additional explanation of this code listing.
function Get_Version_Multi_Mesh (Mesh) result(Version) ! Input variable. type(Multi_Mesh_type), intent(in) :: Mesh ! Variable to be queried. ! Output variable. type(integer) :: Version ! Version number. !~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ! Verify requirements. VERIFY(Valid_State(Mesh),5) ! Mesh is valid. ! Get the value. Version = Mesh%Version ! Verify guarantees - none. return end function Get_Version_Multi_Mesh