"Import assignment cannot be used when targeting ECMAScript modules." should come with a codefix

TypeScript Version: 3.2.0-dev.20181030

Code

a.ts

import abs = require("abs");

tsconfig.json

{
    "compilerOptions": {
        "target": "esnext"
    }
}

The error message is Import assignment cannot be used when targeting ECMAScript modules. Consider using 'import * as ns from "mod"', 'import {a} from "mod"', 'import d from "mod"', or another module format instead.. This indicates that we could provide a code fix.

Expected behavior:

There is a codefix that offers to change this to import abs from "abs";, or import * as abs from "abs";. If --esModuleInterop is set and the imported value is not used only as a namespace, we should prefer a default import.

Actual behavior:

No codefix.

Reproduce the diagnostic with a.ts and the shown tsconfig.json, then trace the compiler's codefix handling for this error. The fix should offer default and namespace import forms, preferring a default import when esModuleInterop is enabled and the value is not used only as a namespace; verify both suggested edits and their applicability.