code: func (f *EndorsementValidationHandler) Handle(requestContext *RequestContext, clientContext *ClientContext) {
  
  	//Filter tx proposal responses
  	err := f.validate(requestContext.Response.Responses)
  	if err != nil {
  		requestContext.Error = errors.WithMessage(err, "endorsement validation failed")
  		return
  	}
  
  	//Delegate to next step if any
  	if f.next != nil {
  		f.next.Handle(requestContext, clientContext)
  	}
  }
docs: //Handle for Filtering proposal response