how to disable loading progress bar text in Vue

[lng0415]

Summary
how to disable loading progress bar text?
i set to this null or "" , but text is seeing default characters (Loading Data).
how to disable text with text area?
(just loading progress bar)

language: {
    name: 'ko',
    value: {
        display: {
            noData: this.noDataStr,
            loadingData: null // "" // progress text
        }
    }
}

Screenshots
If applicable, add screenshots to help explain your question.

Version
2.1.0

Additional context
http://nhn.github.io/tui.grid/latest/Grid#setLanguage API has some options,(noData, loadingData, resizeHandleGuide....)
but Insufficient description of the API.
only thing listed is 'localeCode' and 'data' option
Please write down additional options.

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[js87zz]

@lng0415
The option you inquired is not supported yet. But we are planned to improve datasource functionality. Thank you!

[js87zz]

@lng0415
hideLoadingBar option has been added in v4.9.0(#862)

const dataSource = {
  // hide loading bar
  hideLoadingBar: true,
  api: {
    readData: { 
      url: '/readData', 
      method: 'get'
    }
  }
}

Thank you!