original_string: public static function is_empty_subsystem($component) {
          if (strpos($component, 'core_') === 0) {
              if (null === \core_component::get_subsystem_directory(substr($component, 5))) {
                  // This is a subsystem without a directory.
                  return true;
              }
          }
  
          return false;
      }
code: public static function is_empty_subsystem($component) {
          if (strpos($component, 'core_') === 0) {
              if (null === \core_component::get_subsystem_directory(substr($component, 5))) {
                  // This is a subsystem without a directory.
                  return true;
              }
          }
  
          return false;
      }
code_tokens: public static function is_empty_subsystem ( $ component ) { if ( strpos ( $ component , 'core_' ) === 0 ) { if ( null === \ core_component :: get_subsystem_directory ( substr ( $ component , 5 ) ) ) { // This is a subsystem without a directory. return true ; } } return false ; }
docstring: Return whether this is an 'empty' subsystem - that is, a subsystem without a directory.
  
  @param  string $component Frankenstyle component name.
  @return string The key to retrieve the language string for the null provider reason.
docstring_tokens: Return whether this is an empty subsystem - that is a subsystem without a directory .