Work around Groovy bug

Getting this otherwise:

| Error Fatal error during compilation org.apache.tools.ant.BuildException: BUG! exception in phase 'class generation' in source unit '/home/gustavo/repos/transmartApp/grails-app/services/com/recomdata/transmart/data/export/ACGHDataService.groovy' At line 86 column 39
On receiver: row with message: getAt and arguments: assay
This method should not have been called. Please try to create a simple example reproducing this error and filea bug report at http://jira.codehaus.org/browse/GROOVY (Use --stacktrace to see the full trace)

My 10 minute attempt to reproduce this was uncessuful. Funny thing is,
it was working fine until RegionRow's package was moved.