A possible looped pipeline step for processing IEnumerable<> inputs

LoopStep.cs

using System.Collections.Generic;

namespace StronglyTypedPipelines
{

    public class LoopStep<INPUT,OUTPUT> : IPipelineStep<IEnumerable<INPUT>, IEnumerable<OUTPUT>>
    {
        private IPipelineStep<INPUT, OUTPUT> _internalStep;

        public LoopStep(IPipelineStep<INPUT, OUTPUT> internalStep)
        {
            _internalStep = internalStep;
        }

        public IEnumerable<OUTPUT> Process(IEnumerable<INPUT> input)
        {
            foreach(INPUT item in input)
            {
                yield return _internalStep.Process(item);
            }
        }
    }

}