Collection<T>.count().
This function call can be replaced with .size.
.size form ensures that the operation is O(1) and won't allocate extra objects, whereas
count() could be confused with Iterable<T>.count(), which is O(n) and allocating.
Example:
fun foo() {
var list = listOf(1,2,3)
list.count() // replaceable 'count()'
}
After the quick-fix is applied:
fun foo() {
var list = listOf(1,2,3)
list.size
}