This procedure is defined in the server but not documented via ad_proc or proc_doc and may be intended as a private interface.
The procedure is defined as:
proc ::nsf::method::require {object name per_object} { set key ::nsf::methodIndex($name) if {[info exists $key]} { array set "" [set $key] if {$(script) ne ""} { eval $(script)} if {$per_object} { set cmd [linsert $(definition) 1 -per-object] return [eval [linsert $cmd 1 $object]]} else { return [eval [linsert $(definition) 1 $object]]}} else { error "cannot require method $name for $object, method unknown"} }