import type { Node, CallExpression } from "acorn";
export type FeatureExpression = CallExpression & {
    argument: string;
};
/**
 * Returns all calls to the specified feature (e.g., FileAttachment) in the
 * specified body. Throws a SyntaxError if any of the calls are invalid (e.g.,
 * when FileAttachment is passed a dynamic argument).
 */
export declare function findFeatures(name: string, body: Node, input: string): FeatureExpression[];