Kotlin's function literals have a shortcut for one-argument literals:
the single argument doesn't need to be explicitly named, but can be
referred via the 'it' contextual keyword. Add an intention action for
converting an implicit 'it' parameter to an explicitly named one.
For example, 'array(1, 2, 3).filter { it % 2 == 0 }'
-> 'array(1, 2, 3).filter { x -> x % 2 == 0 }'
Evgeny Gerashchenko