groovydoc information loss when using generics

-------------------------------
$ groovydoc --version
GroovyDoc 2.1.6
$ cat > Foo.groovy <<EOF
class Foo {
List<String> bar()

}
EOF
$ groovydoc Foo.groovy
$ open index.html
-------------------------------

Problem:
Generated GAPI shows only `List bar()` method. Information about generics (String) is lost. This is suboptimal because the API needs to reiterate the same information in the /** */ documentation.

Further information:
http://groovy.329449.n5.nabble.com/groovydoc-information-loss-for-enums-and-generics-td5716165.html