AstRule

interface AstRule {
    "[ROOT]"?: AstStyleSheet;
    chi: (
        | AstAtRule
        | AstRule
        | AstInvalidRule
        | AstComment
        | AstDeclaration
        | AstInvalidAtRule
        | AstInvalidDeclaration
    )[];
    errors?: ErrorDescription[];
    optimized?: OptimizedSelector
    | null;
    parent?: any;
    raw?: RawSelectorTokens | null;
    sel: string;
    state?: any;
    typ: RuleNodeType;
    [key: number]: string | undefined;
}