Classes/Console/Service/Configuration/ConfigurationService.php
private function getType($path)
    {
        $value = null;
        if ($this->hasActive($path)) {
            $value = $this->getActive($path);
        }
        if ($this->hasLocal($path)) {
            $value = $this->getLocal($path);
        }
        if ($this->hasDefault($path)) {
            $value = $this->getDefault($path);
        }

        return gettype($value);
    }
private function getType($path)
    {
        $value = null;
        if ($this->hasActive($path)) {
            $value = $this->getActive($path);
        }
        if ($this->hasLocal($path)) {
            $value = $this->getLocal($path);
        }
        if ($this->hasDefault($path)) {
            $value = $this->getDefault($path);
        }

        return gettype($value);
    }
Returns the type of a value in given config path

@param string $path
@return string