BackupOverviewPopulator Used to populate the BackupOverview object. 


CommentPopulator Populates the comments length in the BackupOverview object 
CustomFieldPopulator Populates ExternalCustomField, com.atlassian.jira.imports.project.core.BackupOverviewBuilderImpl.ConfigurationContext, and com.atlassian.jira.imports.project.core.BackupOverviewBuilderImpl.FieldConfigSchemeIssueType objects from the custom field and custom field configuration data in a backup XML file. 
IssueIdPopulator Populates the issue id's in the BackupOverview object 
PluginVersionPopulator Converts PluginVersion information and sets it on the BackupOverviewPopulator
ProjectComponentPopulator Populates a BackupOverview with project component information. 
ProjectPopulator Converts the project information and sets it into BackupOverview
ProjectVersionPopulator Populates the BackupOverview with version information. 
SystemInfoPopulator This BackupOverviewPopulator reads System Info from OSProperty values and adds it to the BackupOverviewBuilder.