Wojtek Krak

I've made PR, can you review it, please?

@evant @rf43 @nishtahir, please?

Hi @evant, I think you didn't see my PR. Let's start with example, there is list: ``` val list = listOf(1, 2, 3, 4, 1) ``` and my proposed assertions...

I have a case that I need this. Sometimes is useful to check that element exists and is not duplicated on the list. I checked assertj yesterday, and it has...

I know and understand :-) Element values were not important, it could be a,b,c. I choose only "a" accidentally.

Nice! It's a pity that for example ListAssert is not written in such way. If concrete asserts wouldn't have any additional methods, only abstract would add new ones, that would...

I found 'overwrite' option just when I looked at plugin code. Of course issue still remains. Maybe later(later) I will try to make pull request.

I checked that this works, and I'm also interested in merging it. @tkrullmann, pls! @m-kay or do you know some alternatives?