import { Mutator } from "automutate/lib/mutator";
import * as ts from "typescript";
/**
 * Generates mutations from TSLint rule failures using TypeScript AST nodes.
 */
export declare abstract class TsAstMutator extends Mutator {
    /**
     * The file's original AST.
     */
    private originalTree;
    /**
     * Initializes a new instance of the Mutator class.
     *
     * @param originalFileContents   Original contents of the file.
     */
    constructor(originalFileContents: string);
    /**
     * @returns The file's original AST.
     */
    protected getOriginalTree(): ts.SourceFile;
}