| The Google Java Style Guide ยง3.4.1 requires each source file to contain exactly | |
| one top-level class. | |
| ## Suppression | |
| Since `@SuppressWarnings` cannot be applied to package declarations, this | |
| warning can be suppressed by annotating any top-level class in the compilation | |
| unit with `@SuppressWarnings("MultipleTopLevelClasses")`. |