def to_h
hash = {:churn => {:changes => @changes}}
hash[:churn][:class_churn] = @class_changes
hash[:churn][:method_churn] = @method_changes
first_revision = @revisions.first
first_revision_changes = @revision_changes[first_revision]
if first_revision_changes
changes = first_revision_changes
hash[:churn][:changed_files] = changes[:files]
hash[:churn][:changed_classes] = changes[:classes]
hash[:churn][:changed_methods] = changes[:methods]
end
ChurnHistory.store_revision_history(first_revision, hash, @churn_options.data_directory)
hash
end