Manual Triggering of server methods in filepond with filepond params

I want to trigger the fetch method manually in the filepond-react component. I've trimmed down other props for simplification.

  // FileUpload Wrapper
  <div className="file-upload">
    <FilePond
      ref={this.props.innerref}
      files={this.state.files}
      onupdatefiles={this.updateFiles}
      {...this.props}
    />
  </div>

  // Calling the wrapper in the parent component
  <FileUpload
    innerref={this.fileRef}
    server={{
      fetch: this.onFileFetch,
      process: this.onUpload,
      revert: this.onFileRevert,
    }}
  />

Server methods

// fetch
onFileFetch = async (url, load, error, progress, abort, headers) => {
  // function triggers but cannot access load, progress etc. here
}

// upload
onUpload = async (fieldName, file, metadata, load, error, progress, abort) => {
  // function triggers and can access load, error etc.
}

// delete/revert
onFileRevert = async (uniqueFileId, load, error) => {
  // function triggers and can access load, error etc.
}

Behaviour and Triggering

So the upload and delete are triggered when I click the upload and revert icon respectively. I want to trigger fetch() manually and for that I call this.fileRef.current.props.server.fetch()

Why can't the accss the params of that function? (load, error etc.)
I've added the filepond object aka this.fileRef.current below for reference.

```
{current: FilePond}
  current: FilePond
    isMounted: (...)
    replaceState: (...)
    props:
      ref: (...)
      files: []
      instantUpload: false
      oninit: undefined
      labelIdle: "Drag file(s) here<br> or <br><br><span class="filepond--label-action">Browse</span>"
      onupdatefiles: ƒ (fileItems)
      innerref: {current: FilePond}
      className: "in-block s3-bucket-file-input"
      server:
        fetch: ƒ (url, load, error, progress, abort, headers)
        load: ƒ (source, load, error, progress, abort, headers)
        process: ƒ (fieldName, file, metadata, load, error, progress, abort)
        revert: ƒ (uniqueFileId, load, error)
        restore: ƒ (uniqueFileId, load, error, progress, abort, headers)
        remove: ƒ (source, load, error)
        __proto__: Object
      get ref: ƒ ()
      __proto__: Object
    context: {}
    refs: {}
    updater: {isMounted: ƒ, enqueueSetState: ƒ, enqueueReplaceState: ƒ, enqueueForceUpdate: ƒ}
    allowFilesSync: true
    _reactInternalFiber: FiberNode {tag: 1, key: null, stateNode: FilePond, elementType: ƒ, type: ƒ, …}
    _reactInternalInstance: {_processChildContext: ƒ}
    state: null
    _element: input.in-block.s3-bucket-file-input
    _pond: {on: ƒ, onOnce: ƒ, off: ƒ, setOptions: ƒ, addFile: ƒ, …}
    addFile: ƒ addFile(source)
    addFiles: ƒ addFiles()
    getFile: ƒ getFile(query)
    processFile: ƒ processFile(query)
    prepareFile: ƒ prepareFile(query)
    removeFile: ƒ removeFile(query)
    moveFile: ƒ moveFile(query, index)
    getFiles: ƒ getFiles()
    processFiles: ƒ processFiles()
    removeFiles: ƒ removeFiles()
    prepareFiles: ƒ prepareFiles()
    sort: ƒ sort(compare)
    browse: ƒ browse()
    __proto__: Component
    __proto__: Object
```

If you manually call this.fileRef.current.props.server.fetch() you're not passing any of the parameters to the function. FilePond passes these parameters url, load, error, progress, abort, headers when it invokes the function so you should too if you want to use it like that.

The functions don't have to be marked as async they can be normal functions.