anchor.diff:        '';
       };
     };
  -  
  +
   }
   
  
positive.code: 
  let
    cfg = config.services.mesos.master;
    
  in {
  
    options.services.mesos = {
      
      master = {
        enable = mkOption {
          description = "Whether to enable the Mesos Master.";
  
negative.code:         '';
          type = types.str;
        };
  
        workDir = mkOption {
          description = "The Mesos work directory.";
          default = "/var/lib/mesos/master";
          type = types.str;
        };
  
        extraCmdLineOptions = mkOption {
          description = ''
  	  Extra command line options for Mesos Master.
  
  	  See https://mesos.apache.org/documentation/latest/configuration/
  	'';
          default = [ "" ];
          type = types.listOf types.string;
          example = [ "--credentials=VALUE" ];
        };
  
        quorum = mkOption {
          description = ''
            The size of the quorum of replicas when using 'replicated_log' based
            registry. It is imperative to set this value to be a majority of
            masters i.e., quorum > (number of masters)/2.
  
            If 0 will fall back to --registry=in_memory.
          '';
          default = 0;
          type = types.int;
        };
  
        logLevel = mkOption {
          description = ''
            The logging level used. Possible values:
  