src/Resource/FileResource.php
public function checkBooleanValue($value, $import)
    {
        $default = false;

        if ($value === 'relative') {
            $default = true;
        }

        $value = (isset($import[$value])) ? $import[$value] : $default;

        return $this->getBooleanValue($value);
    }
public function checkBooleanValue($value, $import)
    {
        $default = false;

        if ($value === 'relative') {
            $default = true;
        }

        $value = (isset($import[$value])) ? $import[$value] : $default;

        return $this->getBooleanValue($value);
    }
Checks if the passed boolean value is true or false

@param string $value  The value to check
@param mixed  $import The passed import

@return bool Returns the value of the boolean