src/Configuration.php
public function mapBoolean($value)
    {

        // try to map the passed value to a boolean
        if (isset($this->booleanMapping[$value])) {
            return $this->booleanMapping[$value];
        }

        // throw an exception if we can't convert the passed value
        throw new \Exception(sprintf('Can\'t convert %s to boolean', $value));
    }
public function mapBoolean($value)
    {

        // try to map the passed value to a boolean
        if (isset($this->booleanMapping[$value])) {
            return $this->booleanMapping[$value];
        }

        // throw an exception if we can't convert the passed value
        throw new \Exception(sprintf('Can\'t convert %s to boolean', $value));
    }
Map's the passed value to a boolean.

@param string $value The value to map

@return boolean The mapped value
@throws \Exception Is thrown, if the value can't be mapped