com.umlet.element.base.Actor5012065120_:Actor_com.umlet.element.base.Class37021013040_:AccountingBilling_com.umlet.element.base.Class45014010040_:Timer_com.umlet.element.base.Class23014010040_:CallCenter_com.umlet.element.base.Note202017070Collaboration: Describes configuration and interaction of objects.com.umlet.element.base.Relation190160200107lt=- 1: authorise customer> 3: debit customer> 90;20;90;70;180;70com.umlet.element.base.Relation9012616054lt=- do phone call>20;34;140;34com.umlet.element.base.Relation31012616054lt=- 2: log time>20;34;140;34