public function setIndividual_name($individual_name = null)
{
// validation for constraint: string
if (!is_null($individual_name) && !is_string($individual_name)) {
throw new \InvalidArgumentException(sprintf('Invalid value, please provide a string, "%s" given', gettype($individual_name)), __LINE__);
}
$this->individual_name = $individual_name;
return $this;
}