code: public function getPackageVersion()
      {   
          $package_config  = file_get_contents(dirname(__FILE__)."./../composer.json");
  
          if($package_config){
              $package_config_object = json_decode($package_config);        
              if(is_object($package_config_object) && isset($package_config_object->version)){
                  return $package_config_object->version;
              }
          }
          return null;
      }
docs: Retrieves the pacakge version
  
  @return string