setHeaders() public method

Set optional request headers.
public setHeaders ( array $headers ) : Google\Spreadsheet\DefaultServiceRequest
$headers array associative array of key value pairs
return Google\Spreadsheet\DefaultServiceRequest
 public function testSetHeaders()
 {
     $request = new DefaultServiceRequest("token");
     $headers = ["k" => "v"];
     $this->assertTrue($request->setHeaders($headers) instanceof DefaultServiceRequest);
     $this->assertEquals($headers, $request->getHeaders());
 }