stdlib
1.8
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
Common
stdlib
/
kotlin.collections
/
Grouping
/
keyOf
key
Of
abstract
fun
keyOf
(
element
:
T
)
:
K
(
source
)
Extracts the key of an
element
.
Since Kotlin
1.2