code: public function removeDefaultHeader($headers = "")
  	{
  		foreach ($headers as $header)
  			foreach ($this->defaultHeaders as $h => $v)
  				if ($header === $h) unset($this->defaultHeaders[$h]);
  
  		return $this->defaultHeaders;
  	}
docs: Remove one or more default headers
  
  laso returns current default headers
  
  @param string|array $headers header(s) to be removed
  
  @return array list of current default headers