src/Element/CkEditor.php
public function setEditorConfig($config)
    {
        if ($config instanceof Traversable) {
            $config = ArrayUtils::iteratorToArray($config);
        }

        if (!is_array($config)) {
            throw new InvalidArgumentException(
                'The options parameter must be an array or a Traversable'
            );
        }

        $this->editorConfig = $config;

        return $this;
    }
public function setEditorConfig($config)
    {
        if ($config instanceof Traversable) {
            $config = ArrayUtils::iteratorToArray($config);
        }

        if (!is_array($config)) {
            throw new InvalidArgumentException(
                'The options parameter must be an array or a Traversable'
            );
        }

        $this->editorConfig = $config;

        return $this;
    }
Set config for Namespace CKEDITOR.config.

@param array|Traversable $config

@return $this
@throws \InvalidArgumentException