org.activiti.engine.history
接口 
HistoricActivityInstance
HistoricActivityInstanceQuery
HistoricDetail
HistoricDetailQuery
HistoricFormProperty
HistoricIdentityLink
HistoricProcessInstance
HistoricProcessInstanceQuery
HistoricTaskInstance
HistoricTaskInstanceQuery
HistoricVariableInstance
HistoricVariableInstanceQuery
HistoricVariableUpdate
NativeHistoricActivityInstanceQuery
NativeHistoricDetailQuery
NativeHistoricProcessInstanceQuery
NativeHistoricTaskInstanceQuery
NativeHistoricVariableInstanceQuery