relative name of object to be checked for. the \$0 of the parent will be automatically added (with a slash).
perform a check and output the result
0: not found
1: found
to be used only directly inside an abstraction that is to be found directly in a help-patch.
find whether a certain part of the doc exists so far, in the current help-patch.
uplevel from [doc_exist] to help-patch. this is 1 if [doc_exist] is directly in the help-patch, 2 if it is directly inside [doc_h], etc.
does inlet 1 have a doc item ?
what about inlet 2 ?
this silly name mangling should be abolished. it's 0b=bang, 0f=float, 0g=grid, 0s=symbol, 1p=pointer, 2l=list, ~a=