overrid properti chang properti chang event evt evt sourc state machin evt delet instanc event remov equal evt properti model pump remov model event listen state machin remov namespac project project trash diagram factori instanc remov diagram evt sourc state machin namespac equal evt properti object namespac evt valu namespac delet namespac namespac namespac statemachin chang set namespac namespac uml mutabl graph support graph model set home model namespac 