code: def INJECT(adjuster1, adjuster2, *adjusters)
        adjusters = [adjuster1, adjuster2, *adjusters]
  
        unless adjusters.all?{|f|adjustable? f}
          raise TypeError, 'wrong object for adjuster'
        end
  
        ->v{
          adjusters.reduce(v){|ret, adjuster|adjuster.call ret}
        }
      end
docs: Sequencial apply all adjusters.
   @param adjuster1 [Proc, #to_proc]
   @param adjuster2 [Proc, #to_proc]
   @param adjusters [Proc, #to_proc]
   @return [lambda]