Statement.Interface
type t('M, 'T) = {
id: Identifier.t('M, 'T),
tparams: option(Type.TypeParams.t('M, 'T)),
extends: list(('M, Type.Generic.t('M, 'T))),
body: ('M, Type.Object.t('M, 'T)),
comments: option(Syntax.t('M, unit)),
};