src/Observers/CatalogAttributeObserver.php
protected function isSwatchType(array $additionalData)
    {
        return isset($additionalData[CatalogAttributeObserver::SWATCH_INPUT_TYPE]) && in_array($additionalData[CatalogAttributeObserver::SWATCH_INPUT_TYPE], $this->swatchTypes);
    }
protected function isSwatchType(array $additionalData)
    {
        return isset($additionalData[CatalogAttributeObserver::SWATCH_INPUT_TYPE]) && in_array($additionalData[CatalogAttributeObserver::SWATCH_INPUT_TYPE], $this->swatchTypes);
    }
Return's TRUE if the additional data contains a swatch type.

@param array $additionalData The additional data to query for a valid swatch type

@return boolean TRUE if the data contains a swatch type, else FALSE