ElementTypeRegistry.getSpecializationsOf(java.lang.String id)
Gets an array containing all specializations of the element type for
id, in breadth-first order.
ElementTypeRegistry.getSpecializationTypes(
IClientContext clientContext)
Gets the specialization types in the registry that are bound to the
clientContext.
ElementTypeRegistry.register(
ISpecializationType specializationType)
Registers specializationType with this registry, if its ID
is unique in the registry.