src/SnooPHP/Http/Router.php
public function defaultHeader(array $headers = [])
	{
		$this->defaultHeaders = array_merge($this->defaultHeaders, $headers);

		return $this->defaultHeaders;
	}
public function defaultHeader(array $headers = [])
	{
		$this->defaultHeaders = array_merge($this->defaultHeaders, $headers);

		return $this->defaultHeaders;
	}
Add one or more default headers

also returns current default headers

@param array $headers header(s) to be added

@return array list of current default headers