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    Type:Object
    execArgv?:string[]
    List of string arguments passed to the Node.js executable. Default: process.execArgv.
    exec?:string
    File path to worker file. Default: process.argv[1].
    args?:string[]
    String arguments passed to worker. Default: process.argv.slice(2).
    cwd?:string
    Current working directory of the worker process. Default: undefined (inherits from parent process).
    serialization?:string
    Specify the kind of serialization used for sending messages between processes. Possible values are 'json' and 'advanced'. See Advanced serialization for child_process for more details. Default: false.
    silent?:boolean
    Whether or not to send output to parent's stdio. Default: false.
    stdio:Array
    Configures the stdio of forked processes. Because the cluster module relies on IPC to function, this configuration must contain an 'ipc' entry. When this option is provided, it overrides silent. See child_process.spawn()'s stdio.
    uid:number
    Sets the user identity of the process. (See setuid(2).)
    gid:number
    Sets the group identity of the process. (See setgid(2).)
    inspectPort:number | Function
    Sets inspector port of worker. This can be a number, or a function that takes no arguments and returns a number. By default each worker gets its own port, incremented from the primary's process.debugPort.
    windowsHide?:boolean
    Hide the forked processes console window that would normally be created on Windows systems. Default: false.

    After calling .setupPrimary() (or .fork()) this settings object will contain the settings, including the default values.

    This object is not intended to be changed or set manually.

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