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