Effort Formatters 
Effort Icon 
This formatter shows an icon for todos that have effort enabled
| Param | Default  | Description | 
|---|---|---|
| icon | The icon to show for todos with effort | |
| color | None | The color to use for the icon. If not provided, uses the theme's orange color | 
| show_on_zero | True | Whether to show the icon when effort is 0 | 
python
from dooit_extras.formatters import effort_icon
from dooit.ui.api import DooitAPI, subscribe
from dooit.ui.api.events import Startup
@subscribe(Startup)
def setup(api: DooitAPI, _):
    # ...
    api.formatter.todos.effort.add(effort_icon())
    # ...