EntityDataProvider::getFields

public function getFields()
{
	if($this->fields === null)
	{
		$fields = array_keys($this->getEntity()->getFields());
		$hiddenFields = $this->getHiddenFields();
		$fields = array_diff($fields, $hiddenFields);
		foreach($fields as $placeholder)
		{
			$this->fields[$placeholder] = [
				'TITLE' => $this->getEntity()->getField($placeholder)->getTitle(),
			];
		}
	}

	return $this->fields;
}