LineCoreChart does not support vAxes parameter

vAxes is needed for applying multiple vertical axes to the chart. (https://google-developers.appspot.com/chart/interactive/docs/gallery/linechart#Configuration_Options)

I managed to fix it by adding the following line to the LineCoreChartConfigOption.groovy:
V_AXES("vAxes", [DataType.ARRAY, DataType.OBJECT])

Stacktrace:
2012-08-11 19:11:40,432 [http-bio-8080-exec-1] ERROR errors.GrailsExceptionResolver - IllegalArgumentException occurred when processing request: [POST] /chart/renderChart
Attribute 'vAxes' is not a valid option for Google Visualization 'google.visualization.LineChart'!. Stacktrace follows:
java.lang.IllegalArgumentException: Attribute 'vAxes' is not a valid option for Google Visualization 'google.visualization.LineChart'!
at org.grails.plugins.google.visualization.GoogleVisualizationTagLib$_validateAttributes_closure35.doCall(GoogleVisualizationTagLib.groovy:181)
at org.grails.plugins.google.visualization.GoogleVisualizationTagLib.validateAttributes(GoogleVisualizationTagLib.groovy:179)
at org.grails.plugins.google.visualization.GoogleVisualizationTagLib.validateAndRender(GoogleVisualizationTagLib.groovy:166)
at org.grails.plugins.google.visualization.GoogleVisualizationTagLib$_closure22.doCall(GoogleVisualizationTagLib.groovy:113)