PHP \DesignPatterns\Behavioral\ChainOfResponsibilities\Handler \DesignPatterns\Behavioral\ChainOfResponsibilities\Handler \DesignPatterns\Behavioral\ChainOfResponsibilities\Responsible\SlowStorage \DesignPatterns\Behavioral\ChainOfResponsibilities\Responsible\FastStorage \DesignPatterns\Behavioral\ChainOfResponsibilities\Request Fields Constants Constructors Methods private