Use PHPDoc @param string ...$classNames

The `string` is the type of each argument.
The `...` indicates that it is an array of that type, like
`function (string ...$classNames)` also would indicate.

Author: TysonAndre

src/Node.php

@@ -91,7 +91,7 @@ public function getFirstAncestor(...$classNames) {
      * Gets first child that is an instance of one of the provided classes.
      * Returns null if there is no match.
      *
-     * @param array ...$classNames
+     * @param string ...$classNames
      * @return Node|null
      */
     public function getFirstChildNode(...$classNames) {
@@ -117,7 +117,7 @@ public function getFirstChildNode(...$classNames) {
      * Gets first descendant node that is an instance of one of the provided classes.
      * Returns null if there is no match.
      *
-     * @param array ...$classNames
+     * @param string ...$classNames
      * @return Node|null
      */
     public function getFirstDescendantNode(...$classNames) {