java - Gwt NavigableSet no source found -


the following error appear when i'm using navigableset decending key set of treemap:
[error] [workflow] - line 159: no source code available type java.util.navigableset<e>; did forget inherit required module? [error] [workflow] - line 159: method descendingkeyset() undefined type treemap<integer,string>

here code use: navigableset<integer> nmap = selectedrow.descendingmap();

does know error comes ? (for information i've imported right class: java.util.navigableset )

i don't have enough rep comment... sorry. version of gwt using? looks there bug here:

https://code.google.com/p/google-web-toolkit/issues/detail?id=4236

fixed in 2.7.0 rc1


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