public function testStyle()
 {
     $this->assertFalse($this->decoratedFormatter->hasStyle('nonExisting'));
     $outputFormatterStyle = new OutputFormatterStyle('blue');
     $this->decoratedFormatter->setStyle('blue', $outputFormatterStyle);
     $this->assertTrue($this->decoratedFormatter->hasStyle('blue'));
     $this->assertSame($outputFormatterStyle, $this->decoratedFormatter->getStyle('blue'));
 }