rb_thread_blocking_region deprecated, no alternative in ruby.h
In "ruby/intern.h", the function declaration for
rb_thread_blocking_region is deprecated. The comment says "Use rb_thread_call_without_gvl family instead", yet there are no functions from that family in the header that can be used by extensions.
Should the method
rb_thread_call_without_gvl be included in the header "ruby/intern.h" ?