ClientDataProvider::prepareExportHeaders

public function prepareExportHeaders(array &$headers): void
{
	$aliases = [];
	foreach (\CCrmFieldMulti::GetEntityTypeList() as $fieldId => $types)
	{
		$fieldIdWithPrefix = $this->fieldHelper->addPrefixToFieldId($fieldId);
		$aliases[$fieldIdWithPrefix] = [];

		foreach ($types as $typeId => $typeName)
		{
			$aliases[$fieldIdWithPrefix][] = $this->fieldHelper->addPrefixToFieldId($fieldId . '_' . $typeId);
		}
	}
	\CCrmComponentHelper::PrepareExportFieldsList(
		$headers,
		$aliases,
		false
	);
}