import type { BasicValue, JsonObj, JsonValue, Primitive } from "./types.js";
export declare function is_Object(x: unknown): x is JsonObj;
export declare function is_Primitive(x: unknown): x is Primitive;
export declare function is_not_string(txt: JsonValue): txt is BasicValue;
export declare function is_string(txt: JsonValue): txt is string;
export declare function is_void_node(content: readonly unknown[]): boolean;
export declare function is_plain_object(x: unknown): x is Record<string, unknown>;
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