Groovy editor got problems of resolving the full qualified class name in groovy class files

When opening a groovy class file and viewing its source code the editor, it is not factoring in the default imports of groovy (java.util ... etc.)

e.g.
1) Opening groovy.util.ConfigObject.class of the groovy-all.jar (1.7.8)
2) pointin the mouse over "new Properties()" in line 113
the editor does not know that it is "java.util.Properties"
instead it offers 3 possible Solutions:

• com.sun.xml.internal.fastinfoset.sax.Properties

• java.util.Properties

• com.sun.xml.internal.stream.buffer.sax.Properties