one of possibly several objects used to annotate the method
in a way that identifies its role in the method combination.
The method combinationtype determines
how many qualifiers are permitted for each method,
which qualifiers are permitted,
and
the semantics of those qualifiers.
query I/On.
the bidirectionalstream
that is the value of the variable*query-io*.
quoted objectn.
an object which is the second element of a
quoteform.