Maps.unmodifiableNavigableMap not covariant in V

[GoogleCodeExporter]

Maps.unmodifiableNavigableMap is declared as follows:

<K, V> NavigableMap<K, V> unmodifiableNavigableMap(NavigableMap<K, V> map);

this could be changed to 

<K, V> NavigableMap<K, V> unmodifiableNavigableMap(NavigableMap<K, ? extends V> 
map);

as there are no methods in NavigableMap that take a V as a method parameter. 
This would also be consistent with the declarations of 
Collections.unmodifiableSortedMap and ImmutableSortedMap.copyOfSorted.

Original issue reported on code.google.com by thecoop1...@googlemail.com on 23 Oct 2014 at 8:42

[GoogleCodeExporter]

I believe you are correct. And this will probably be sufficiently safe to 
change. Thanks!

Original comment by kevinb@google.com on 23 Oct 2014 at 2:20

• Changed state: Accepted
• Added labels: Type-Defect
• Removed labels: Type-Enhancement

[GoogleCodeExporter]

This issue has been migrated to GitHub.

It can be found at https://github.com/google/guava/issues/<issue id>

Original comment by cgdecker@google.com on 1 Nov 2014 at 4:08

• Added labels: MigratedToGitHub

[GoogleCodeExporter]

Original comment by cgdecker@google.com on 1 Nov 2014 at 4:17

• Changed state: Migrated

[GoogleCodeExporter]

Original comment by cgdecker@google.com on 3 Nov 2014 at 9:07

• Added labels: Restrict-AddIssueComment-Commit