+ /**
+ * Utility method taking an array of elements and wrapping
+ * each element in it's own array. Useful for data providers
+ * that only return a single argument.
+ *
+ * @since 1.20
+ *
+ * @param array $elements
+ *
+ * @return array
+ */
+ protected function arrayWrap( array $elements ) {
+ return array_map(
+ function( $element ) {
+ return array( $element );
+ },
+ $elements
+ );
+ }
+