<@U0C4292KA>: you need to use `operator` for all f...

# announcements

[yole]

@jasoet-gdp: you need to use operator for all functions that are called though something other than the normal function call syntax or the infix call syntax. those are all the functions listed here: https://kotlinlang.org/docs/reference/operator-overloading.html + also functions used in for loops (iterator, next, hasNext) and delegated properties