com.atlassian.jira.issue.history
Interfaces 
DateRangeBuilder
DateTimeFieldChangeLogHelper
Classes 
AbstractDateRangeBuilder
AssigneeDateRangeBuilder
ChangeItemBean
ChangeLogUtils
DateTimeFieldChangeLogHelperImpl
IssueHistoryLinkFactory
PriorityDateRangeBuilder
ReporterDateRangeBuilder
ResolutionDateRangeBuilder
StatusDateRangeBuilder
VersionDateRangeBuilder