Add groupingBy and eachCount sample.

libraries/stdlib/src/generated/_Arrays.kt

@@ -7716,6 +7716,8 @@ public inline fun <K, V, M : MutableMap<in K, MutableList<V>>> CharArray.groupBy
 /**
  * Creates a [Grouping] source from an array to be used later with one of group-and-fold operations
  * using the specified [keySelector] function to extract a key from each element.
+ * 
+ * @sample samples.collections.Collections.Transformations.groupingByEachCount
  */
 @SinceKotlin("1.1")
 public inline fun <T, K> Array<out T>.groupingBy(crossinline keySelector: (T) -> K): Grouping<T, K> {

libraries/stdlib/src/generated/_Collections.kt

@@ -1193,6 +1193,8 @@ public inline fun <T, K, V, M : MutableMap<in K, MutableList<V>>> Iterable<T>.gr
 /**
  * Creates a [Grouping] source from a collection to be used later with one of group-and-fold operations
  * using the specified [keySelector] function to extract a key from each element.
+ * 
+ * @sample samples.collections.Collections.Transformations.groupingByEachCount
  */
 @SinceKotlin("1.1")
 public inline fun <T, K> Iterable<T>.groupingBy(crossinline keySelector: (T) -> K): Grouping<T, K> {

libraries/stdlib/src/generated/_Sequences.kt

@@ -666,6 +666,8 @@ public inline fun <T, K, V, M : MutableMap<in K, MutableList<V>>> Sequence<T>.gr
 /**
  * Creates a [Grouping] source from a sequence to be used later with one of group-and-fold operations
  * using the specified [keySelector] function to extract a key from each element.
+ * 
+ * @sample samples.collections.Collections.Transformations.groupingByEachCount
  */
 @SinceKotlin("1.1")
 public inline fun <T, K> Sequence<T>.groupingBy(crossinline keySelector: (T) -> K): Grouping<T, K> {

libraries/stdlib/src/generated/_Strings.kt

@@ -713,6 +713,8 @@ public inline fun <K, V, M : MutableMap<in K, MutableList<V>>> CharSequence.grou
 /**
  * Creates a [Grouping] source from a char sequence to be used later with one of group-and-fold operations
  * using the specified [keySelector] function to extract a key from each character.
+ * 
+ * @sample samples.collections.Collections.Transformations.groupingByEachCount
  */
 @SinceKotlin("1.1")
 public inline fun <K> CharSequence.groupingBy(crossinline keySelector: (Char) -> K): Grouping<Char, K> {

libraries/stdlib/src/kotlin/collections/Grouping.kt

@@ -224,6 +224,8 @@ public inline fun <S, T : S, K, M : MutableMap<in K, S>> Grouping<T, K>.reduceTo
  * Groups elements from the [Grouping] source by key and counts elements in each group.
  *
  * @return a [Map] associating the key of each group with the count of elements in the group.
+ *
+ * @sample samples.collections.Collections.Transformations.groupingByEachCount
  */
 @SinceKotlin("1.1")
 @JvmVersion
@@ -241,6 +243,8 @@ public fun <T, K> Grouping<T, K>.eachCount(): Map<K, Int> =
  * that value is used as an initial value of the counter for that group.
  *
  * @return the [destination] map associating the key of each group with the count of elements in the group.
+ *
+ * @sample samples.collections.Collections.Transformations.groupingByEachCount
  */
 @SinceKotlin("1.1")
 public fun <T, K, M : MutableMap<in K, Int>> Grouping<T, K>.eachCountTo(destination: M): M =