GoogleSpreadsheet\Tests\Google\Spreadsheet\DefaultServiceRequestTest::testRemoveHeader PHP Method

    public function testRemoveHeader()
    {
        $request = new DefaultServiceRequest("token");
        $headers = ["k" => "v"];
        $request->addHeader("k", "v");
        $this->assertEquals($headers, $request->getHeaders());
        $this->assertTrue($request->removeHeader("k") instanceof DefaultServiceRequest);
        $this->assertEquals([], $request->getHeaders());
    }