func RenameWorkspace(wrk *workspace.Workspace, newName string) error {
if len(newName) == 0 {
return fmt.Errorf("workspaces must have a name of length at least one.")
}
if Heads.Workspaces.Find(newName) != nil {
return fmt.Errorf("a workspace with name '%s' already exists.", newName)
}
wrk.Rename(newName)
ewmhDesktopNames()
return nil
}
