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<?php namespace Give\Framework\FieldsAPI\Concerns; use Give\Framework\FieldsAPI\Contracts\Collection; /** * A declarative iterator for each Node in the tree. / trait WalkNodes { /* * @param callable $callback * * @return void / public function walk(callable $callback) { $this->walkCollection($this, $callback); } /* * @param Collection $collection * @param callable $callback * * @return void / public function walkCollection(Collection $collection, callable $callback) { foreach ($collection->all() as $node) { $callback($node); if ($node instanceof Collection) { $this->walkCollection($node, $callback); } } } /* * @param callable $callback * * @return void */ public function walkFields(callable $callback) { foreach ($this->getFields() as $field) { $callback($field); } } }