/**
 * @fileoverview Contains a common logic that is used to typescript transformers that transforms
 * ts helper (those in tslib) emits.
 */
import * as ts from 'typescript';
import { TsickleHost } from 'tsickle';
export default abstract class TsHelperTransformer {
    private tsickleHost;
    private context;
    private sf;
    constructor(tsickleHost: TsickleHost, context: ts.TransformationContext, sf: ts.SourceFile);
    protected factory: ts.NodeFactory;
    protected abstract readonly HELPER_NAME: string;
    /**
     * Determines whether the given node is a tslib helper call. Such a call expression looks similar
     * to usual `__decorate(...)` function calls, except that the identifier node __decorate has
     * a hidden emitNode property. This is encoded in `identifierIsEmitHelper` call and this method
     * uses it.
     */
    protected isTsGeneratedHelperCall(node: ts.Node): node is ts.CallExpression;
    /**
     * Queries whether a visiting node is a call to tslib helper functions, such as
     * `tslib_1.__decorate(...)` that is generated by the TS compiler, and if so, returns a new node.
     * Otherwise, return undefined.
     */
    protected abstract onHelperCall(node: ts.CallExpression, googReflectImport: ts.Identifier): ts.CallExpression | undefined;
    private maybeTsGeneratedHelperCall;
    transformSourceFile(): ts.SourceFile;
    protected combineStatements(stmts: ts.Statement[], googReflectImport?: ts.Identifier): ts.Statement[];
    private createGoogReflectRequire;
}