groovy.lang
Interfaces 
Buildable
GroovyInterceptable
GroovyObject
GroovyResourceLoader
Interceptor
Range
Writable
Classes 
BenchmarkInterceptor
Binding
Closure
DelegatingMetaClass
EmptyRange
GroovyClassLoader
GroovyClassLoader.ClassCollector
GroovyClassLoader.InnerLoader
GroovyCodeSource
GroovyObjectSupport
GroovyShell
GString
IntRange
MetaArrayLengthProperty
MetaBeanProperty
MetaClass
MetaClassImpl
MetaClassRegistry
MetaExpandoProperty
MetaFieldProperty
MetaMethod
MetaProperty
NonEmptySequence
ObjectRange
ParameterArray
PropertyValue
ProxyMetaClass
Reference
Script
Sequence
SpreadMap
TracingInterceptor
Tuple
Exceptions 
BitwiseNegateEvaluatingException
ClosureException
DeprecationException
GroovyRuntimeException
IllegalPropertyAccessException
IncorrectClosureArgumentsException
MissingClassException
MissingFieldException
MissingMethodException
MissingPropertyException
ReadOnlyPropertyException
SpreadListEvaluatingException
SpreadMapEvaluatingException
StringWriterIOException