This part of the documentation will focus on the usage of this package.
This package has a dependency on two ext- composer packages.
This mean that it is dependent on PHP extensions.
The depedency ext-json is a built-in PHP extension which provides the various JSON functions, most importantly json_encode and json_decode.
Because is bundled with PHP by default, no installation actions are required.
The dependency ext-yaml is a PHP extension which is not bundled with PHP by default.
For this extension follow the installation instructions provided by PHP here.
The extension is installed through PECL, the documentation for that can be found here.