==== tests/cases/compiler/importAsBaseClass_1.ts (2 errors) ====
    import Greeter = require("importAsBaseClass_0");
    class Hello extends Greeter { }
                        ~~~~~~~
!!! importAsBaseClass_1.ts(2,21): error TS2073: A class may only extend another class.
                        ~~~~~~~
!!! importAsBaseClass_1.ts(2,21): error TS4022: Type reference cannot refer to container 'Greeter'.
    
==== tests/cases/compiler/importAsBaseClass_0.ts (0 errors) ====
    export class Greeter {
       greet() { return 'greet' }
    }
    