Delete SimpleVectorArg.mapped() is called in non-testing files, so this method should be public, and so the class must be public.
@@ -169,7 +169,6 @@ public final class CustomCommandLine extends CommandLine {
* <p>Call {@link SimpleVectorArg#mapped} to produce a vector arg that maps from a given type to
* a string.
*/
- @VisibleForTesting
public static class SimpleVectorArg<T> extends VectorArg<T> {
private final Object values;
