/**
* Return the value of current field
*
* @param FieldDefinition $fieldDefinition
* @return null
* @throws \OutOfBoundsException
*/
public function getFieldValue(FieldDefinition $fieldDefinition)
{
if (!$this->valid()) {
throw new OutOfBoundsException();
}
$current = $this->current();
return isset($current[$fieldDefinition->getFieldName()]) ? $current[$fieldDefinition->getFieldName()] : null;
}
