This Exception is thrown when more than one Composite implements a MixinType
that one tries to use to create a Composite instance from.
For instance;
public interface AbcComposite extends TransientComposite, Abc
{}
public interface DefComposite extends TransientComposite, Def
{}
public interface Abc
{}
public interface Def extends Abc
{}
TransientBuilder cb = factory.newTransientBuilder( Abc.class );
In the code above, both the AbcComposite and DefComposite implement Abc, and therefore
the newTransientBuilder
method can not unambiguously figure out which
one is intended.