Configuration.php
public function get($namespace, $name, $default = null, $require = false)
    {
        $configuration = $this->load($namespace, $require);
        return array_key_exists($name, $configuration) ? $configuration[$name] : $default;
    }
public function get($namespace, $name, $default = null, $require = false)
    {
        $configuration = $this->load($namespace, $require);
        return array_key_exists($name, $configuration) ? $configuration[$name] : $default;
    }
Get a configuration from namespace

@param string $namespace
Configuration $name.
@param string $namespace
Configuration name.
@param mixed $default
(optional) Default value if cannot find configuration.
@param  boolean $require
(optional) Throw expcetion if namespace configuration file could not be
found.

@return mixed|null
Configurations or null if file not found.