korlov42 commented on code in PR #817:
URL: https://github.com/apache/ignite-3/pull/817#discussion_r882366487
##########
modules/core/src/main/java/org/apache/ignite/internal/util/CollectionUtils.java:
##########
@@ -107,6 +107,27 @@ public static <T> T first(Collection<? extends T> col) {
return col.iterator().next();
}
+ /**
+ * Gets first element from given iterable or returns {@code null} if list
is empty.
+ *
+ * @param iterable Iterable to retrieve the first element.
+ * @param <T> Type of the elements of the list.
+ * @return The first element of the given iterable or {@code null} in case
the iterable is null or empty.
+ */
+ public static <T> T first(Iterable<? extends T> iterable) {
Review Comment:
```suggestion
public static <T> @Nullable T first(Iterable<? extends T> iterable) {
```
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