It doesn't get translated in the TS build, for one.

Script I used:

```python
import os

for (dirpath, dirnames, filenames) in os.walk('.'):
    if '.git' in dirpath:
        continue
    if 'node_modules' in dirpath:
        continue
    if 'dist' in dirpath:
        continue
    if 'types' in dirpath:
        continue
    for filename in filenames:
        path = os.path.join(dirpath, filename)
        if not path.endswith('.js') and not path.endswith('.ts'):
            continue
        #print(path)
        with open(path, 'r+') as f:
            #print(f)
            data = f.read()
            if '__filename' in data:
                p, ext = os.path.splitext(path)
                txt = f"'{p[2:]}'"
                print(txt)
                data = data.replace('__filename', txt)  # Assign the result back to data
                f.seek(0)
                f.write(data)
                f.truncate()
```

* ref: Remove PrecallTest.

* ref: Remove callstats support.

Webpack 2 defines module.exports as a read-only property in ES6 modules.

Webpack 2 defines module.exports as a read-only property in ES6 modules.

Does not fire an "IncompatibleVersionsEvent" in case the
reported XMPP server version changes.

Logs versions of components and library version. Logs shard and region if available.