export interface DateTypeUpgrade {
    modelName: string;
    attribute: string;
    from: string;
    reason: 'sql-ddl' | 'name-at' | 'name-date';
}
/**
 * Upgrade String-typed date attributes to `DateTime`. Mutates
 * `facts.entities[].attributes[].declaredType`. Returns the upgrades.
 */
export declare function refineDateTypes(facts: {
    entities: any[];
}, sourceDir: string): DateTypeUpgrade[];
//# sourceMappingURL=date-type-refinement.d.ts.map