src/Auth/SimpleRbacAuthorize.php
public function getPrefixMap() {
		$prefixMap = (array) Configure::read('SimpleRbac.prefixMap');
		if (empty($prefixMap) && $this->_config['allowEmptyPrefixMap'] === false) {
			throw new \RuntimeException('SimpleRbac.prefixMap configuration is empty!');
		}
		return $prefixMap;
	}
public function getPrefixMap() {
		$prefixMap = (array) Configure::read('SimpleRbac.prefixMap');
		if (empty($prefixMap) && $this->_config['allowEmptyPrefixMap'] === false) {
			throw new \RuntimeException('SimpleRbac.prefixMap configuration is empty!');
		}
		return $prefixMap;
	}
Can be overriden if inherited with a method to fetch this from anywhere, a database for exaple

@return array
@throws \RuntimeException