grails.util
Classes 
BuildSettingsHolder
ClosureToMapPopulator
DomainBuilder
DomainBuilder.DefaultGrailsChildPropertySetter
ExtendedProxy
GenerateUtils
GrailsConfig
GrailsNameUtils
GrailsUtil
GrailsWebUtil
JSonBuilder
Metadata
Metadata.FinalReference
OpenRicoBuilder
Enums 
BuildScope
Environment