Cabled jumper, age 1-2years, chest 21”, suitable for boy or girl

I don’t normally explain why I design patterns, but this one was extra special. I made this jumper for a little boy, Chester. He hasn’t had the easiest start to life and still has a feeding tube. His mum wanted a jumper that would be easy to get on and off and would accommodate the tube, hence the buttoned opening on the shoulder.