SFAPIclient/Requests/Response/Headers.php
public function offsetGet($key) {
		$key = strtolower($key);
		return isset($this->data[$key]) ? $this->data[$key] : null;
	}
public function offsetGet($key) {
		$key = strtolower($key);
		return isset($this->data[$key]) ? $this->data[$key] : null;
	}
public function offsetGet ( $ key ) { $ key = strtolower ( $ key ) ; return isset ( $ this -> data [ $ key ] ) ? $ this -> data [ $ key ] : null ; }
Get the given header

@param string $key
@return string Header value
Get the given header