/**
 * Irreversible: permanently deletes a thread and all its messages (bypasses the
 * trash; cannot be undone). Prefer trash_thread unless permanence is intended.
 */
export declare const delete_thread: import("../../../lib/operation.js").Operation<import("@googleapis/gmail").gmail_v1.Gmail, import("zod").ZodObject<{
    threadId: import("zod").ZodString;
}, import("zod/v4/core").$strict>, import("zod").ZodObject<{
    threadId: import("zod").ZodString;
}, import("zod/v4/core").$strip>>;
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