AbstractMergeAction A baseclass for all the merge tool actions. 
SchemeMergeAction This action is the second step in the wizard for scheme merging, it prompts you to select which schemes to merge. 
SchemeMergePreviewAction This action is used to generate the preview of the selected entries for the scheme merge tool. 
SchemeMergeResultAction This is the last step in the scheme merge wizard, it performs the actual persisting of the merge and shows the results. 
SchemeTypePickerAction This is the first step in the scheme merge tool it allows you to select the type of scheme to merge and if the schemes are associated or all schemes.