How can i fixed the first item

[summerpen]

I want to fixed the first item in sortable,and it can't drag and it's order doesn't change,
how can i get this.

[kuangpeng]

hi! do you resolve this?

[DouglasCalora]

@kuangpeng I found this example on docs: https://jsbin.com/nawahef/edit?js,output
It was hard to find.

[zsytssk]

@DouglasCalora you are the hero!