ActionParams An interface that is off the same format as the Map returned by Action.getParameters. 
CollectionParams This is a field params with Lists as the value  
FieldParams A parent interface for transport objects in JIRA. 
FieldTransportParams This contains String > Collection of Transport Objects  
FieldValuesHolder Key is the field id, the value contain Strings of a undetermined dimension  
StringParams Field params where all values are collections of Strings