import { RollupWarning } from 'rollup';
import { RuntimeCompilerDiagnostic } from '../interfaces';
/**
 * A Rollup onwarn function.
 * Add warnings to the given diagnostics array.
 *
 * @param diagnostics - Array of errors and warnings accumulated while bundling
 */
export declare function handleRollupWarning(diagnostics: RuntimeCompilerDiagnostic[]): (warning: string | RollupWarning) => void;
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