CSS_PSEUDO_CLASS_SELECTOR: ObjectSchema<
    {
        end: OptionalSchema<NumberSchema<undefined>, undefined>;
        start: OptionalSchema<NumberSchema<undefined>, undefined>;
        type: LiteralSchema<"PseudoClassSelector", undefined>;
    },
    undefined,
> = ...

Validator for AST.CSS.PseudoClassSelector @NO_SIDE_EFFECTS