groovy.lang
Interfaces 
AdaptingMetaClass
Buildable
ClosureInvokingMethod
ExpandoMetaClass.Callable
GroovyInterceptable
GroovyObject
GroovyResourceLoader
Interceptor
MetaClass
MetaClassRegistry
MetaClassRegistryChangeEventListener
MetaObjectProtocol
MutableMetaClass
PropertyAccessInterceptor
ProxyMetaClass.Callable
Range
Writable
Classes 
BenchmarkInterceptor
Binding
Closure
Closure.WritableClosure
DelegatingMetaClass
DoSetContext
DummyMetaMethod
EmptyRange
ExpandoMetaClass
ExpandoMetaClass.DefiningClosure
ExpandoMetaClass.ExpandoMetaConstructor
ExpandoMetaClass.ExpandoMetaProperty
ExpandoMetaClass.MixedInAccessor
ExpandoMetaClass.StaticDefiningClosure
ExpandoMetaClass.SubClassDefiningClosure
ExpandoMetaClassCreationHandle
GString
GetBeanMethodMetaProperty
GetMethodMetaProperty
GroovyClassLoader
GroovyClassLoader.ClassCollector
GroovyClassLoader.InnerLoader
GroovyCodeSource
GroovyLogTestCase
GroovyObjectSupport
GroovyShell
GroovySystem
Index
IntRange
IntRange.IntRangeIterator
MOPIter
MetaArrayLengthProperty
MetaBeanProperty
MetaClassImpl
MetaClassRegistry.MetaClassCreationHandle
MetaClassRegistryChangeEvent
MetaExpandoProperty
MetaMethod
MetaProperty
MethodIndex
MethodIndexAction
NonEmptySequence
ObjectRange
ParameterArray
PropertyValue
ProxyMetaClass
Reference
Script
Sequence
SpreadMap
TracingInterceptor
Tuple
Exceptions 
ClosureException
DeprecationException
GroovyRuntimeException
IllegalPropertyAccessException
IncorrectClosureArgumentsException
MissingClassException
MissingFieldException
MissingMethodException
MissingPropertyException
ReadOnlyPropertyException
SpreadListEvaluatingException
SpreadMapEvaluatingException
StringWriterIOException
Annotation Types 
Category
Delegate
Grab
Grapes
Immutable
Lazy
Mixin
Newify
PackageScope
Singleton