original_string: public function getSubConfig($_)
      {
          $keys = $this->validateKeys(func_get_args());
  
          $subConfig = clone $this;
          $subConfig->reduceToSubKey($keys);
  
          return $subConfig;
      }
code: public function getSubConfig($_)
      {
          $keys = $this->validateKeys(func_get_args());
  
          $subConfig = clone $this;
          $subConfig->reduceToSubKey($keys);
  
          return $subConfig;
      }
code_tokens: public function getSubConfig ( $ _ ) { $ keys = $ this -> validateKeys ( func_get_args ( ) ) ; $ subConfig = clone $ this ; $ subConfig -> reduceToSubKey ( $ keys ) ; return $ subConfig ; }
docstring: Get a new config at a specific sub-level.
  
  @since 0.1.13
  
  @param string|array $_ List of keys.
  
  @return ConfigInterface
  @throws KeyNotFoundException If an unknown key is requested.
docstring_tokens: Get a new config at a specific sub - level .