qrcode.chapril.org/vendor/wikimedia/less.php/lib/Less/Configurable.php

<?php
/**
 * @private
 */
abstract class Less_Configurable {

	/**
	 * Array of options
	 *
	 * @var array
	 */
	protected $options = [];

	/**
	 * Array of default options
	 *
	 * @var array
	 */
	protected $defaultOptions = [];

	/**
	 * Set options
	 *
	 * If $options is an object it will be converted into an array by called
	 * it's toArray method.
	 *
	 * @param array|object $options
	 */
	public function setOptions( $options ) {
		$options = array_intersect_key( $options, $this->defaultOptions );
		$this->options = array_merge( $this->defaultOptions, $this->options, $options );
	}

	/**
	 * Get an option value by name
	 *
	 * If the option is empty or not set a NULL value will be returned.
	 *
	 * @param string $name
	 * @param mixed $default Default value if confiuration of $name is not present
	 * @return mixed
	 */
	public function getOption( $name, $default = null ) {
		if ( isset( $this->options[$name] ) ) {
			return $this->options[$name];
		}
		return $default;
	}

	/**
	 * Set an option
	 *
	 * @param string $name
	 * @param mixed $value
	 */
	public function setOption( $name, $value ) {
		$this->options[$name] = $value;
	}

}