Create SequencerOutputMap.addProperty Method

It would be helpful to either add an addProperty method to SequencerOutputMap or change the semantics of SequencerOutputMap.setProperty to append values instead of overwriting them. This would allow multiple sequencers (e.g., a JAR sequencer, an ESB JAR sequencer, a SOA Governance sequencer) to operate on the same input and write to the same output nodes while adding one or more mixin types per sequencer (i.e., JAR sequencer adds java:jar mixin type, SOA-G sequencer adds jboss:artifact mixin type, no conflicts).

There are, of course, other ways to solve this problem