===Usage===
Use this activity to push a single object to certain {{UBIK}} Clients. The criterions to which clients the object should be actually pushed can be defined with subsequent PushCriterion activities. It is a nestable activity, which means it can host any amount of sub-activities that will be processed sequentially. The hosted activities are typically Push criterions like PushCriterionLogin, either as direct children but also wrapped within looping activities like ForEach or While.