import * as t from '@babel/types';
/**
 * Returns whether a node is a unary expression that represents a negative number.
 * @param node The AST node.
 * @returns Whether.
 */
export declare function isNegativeNumericLiteral(node: t.Node): node is t.UnaryExpression & {
    operator: '-';
    argument: t.NumericLiteral;
};