How to omit icon for files with no extension?

[ic-768]

I would like to keep all icons as they are currently, but not show any icon next to files that don't have an extension. I've tried adding this to coc-settings.json, but it doesn't work.

  "explorer.icon.customIcons": {
    "icons": {
      "none":{
        "code":" ",
        "color":"#ffffff"
      }
    },
    "extensions": {"":"none"},
  },

Any way to make this happen?

[weirongxu]

  "explorer.icon.customIcons": {
    "icons": {
      "file":{
        "code":" ",
        "color":"#ffffff"
      }
    }
  },

[ic-768]

Thank you! This works