/**
 * Prune a generated DTO file's `class-validator` import to exactly the
 * decorators it actually uses.
 *
 * The validator import list is assembled from a fixed base set plus field-type
 * inferences, which can over-include (e.g. `IsOptional` when every field and
 * relationship is required, or `IsDefined` when everything is optional). An
 * unused import is an ESLint `no-unused-vars` error, so we filter the list down
 * to the names that appear as a `@Name(` decorator in the rest of the file.
 *
 * @param content - The full generated DTO file content.
 * @returns The content with its class-validator import line pruned.
 */
export declare function pruneClassValidatorImports(content: string): string;
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