original_string: public function getConfig($alias = null)
      {
          if ($alias === null) {
              return $this->_config;
          }
  
          return isset($this->_config[$alias]) ? $this->_config[$alias] : [];
      }
code: public function getConfig($alias = null)
      {
          if ($alias === null) {
              return $this->_config;
          }
  
          return isset($this->_config[$alias]) ? $this->_config[$alias] : [];
      }
code_tokens: public function getConfig ( $ alias = null ) { if ( $ alias === null ) { return $ this -> _config ; } return isset ( $ this -> _config [ $ alias ] ) ? $ this -> _config [ $ alias ] : [ ] ; }
docstring: Returns configuration for an alias or the full configuration array for all aliases.
  
  @param string|null $alias Alias to get config for, null for complete config.
  @return array The config data.
docstring_tokens: Returns configuration for an alias or the full configuration array for all aliases .