Feature request: Being able to pass function as classes

[doumart]

const useStyle = makeStyle<any>((theme) => ({
  buttonText: (disabled: boolean): TextStyle => ({
    color: disabled ? theme.colors.typography.disabled : theme.colors.actions.brand.tertiary
  }),
}));

type Styles = ViewStyle | TextStyle | ImageStyle
export interface Style {
    [key: string]: Styles | (...args?: any[]) => Styles;
}