Interface AstAtRule

interface AstAtRule {
    chi?:
        | (AstDeclaration | AstComment | AstInvalidDeclaration)[]
        | (AstComment | AstRule)[];
    loc?: Location;
    nam: string;
    parent?: AstRuleList;
    tokens?: Token[];
    typ: AtRuleNodeType;
    val: string;
    validSyntax?: boolean;
}