Remembers the fields where a callback should be inserted. For each method
that references the specified field, a callback is woven using the
MethodWeaver class.
version: $Revision$ author: Johann Gyger author: Angela Nicoara
Weave advice that are associated with the field in this weaver. The
weaving is actually done by the MethodWeaver. This method only informs the
MethodWeaver instances that are involved.