# File rbSnack/tkSnack.rb, line 597
    def length=(n, units=nil)
        #Incase options where specified as hash, accept it anyway
        return Snack::exeTkCmd([@name, 'length', n], units) if units.type==Hash
        options={}
        options = { 'unit'=>units } unless units ==nil
        Snack::exeTkCmd([@name, 'length', n], options)    
    end