Add groupingBy and eachCount sample.

js/js.libraries/src/core/generated/_ArraysJs.kt

@@ -7635,6 +7635,8 @@ 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> {

js/js.libraries/src/core/generated/_CollectionsJs.kt

@@ -1183,6 +1183,8 @@ 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> {

js/js.libraries/src/core/generated/_SequencesJs.kt

@@ -648,6 +648,8 @@ 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> {

js/js.libraries/src/core/generated/_StringsJs.kt

@@ -705,6 +705,8 @@ 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> {