bluej.extensions is used in

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BArray
|
BClass
BClassTarget
|
BConstructor
|
BDependency
|
BField
|
BMethod
|
BObject
|
BPackage
|
BProject
|
ClassNotFoundException
|
CompilationNotStartedException
|
Extension
ExtensionBridge
ExtensionException
ExtensionUnloadedException
|
InvocationArgumentException
|
InvocationErrorException
|
MenuGenerator
|
MissingJavaFileException
|
PackageAlreadyExistsException
|
PackageNotFoundException
|
ProjectNotOpenException