Avoid all builders (complex to write) and update WaveBase to add chainable method.

Before:
ShowModelWaveBuilder.create()
.childrenPlaceHolder(this.application.getRootNode().getChildren())
.showModelKey(getFacade().getUiFacade().buildKey((Class) this.application.getFirstModelClass()))
.build();

After:
WaveBase.create()
.relatedClass(ShowModelCommand.class)
.waveGroup(CALL_COMMAND)
.waveBean(
DisplayWaveBean.create()
.childrenPlaceHolder(this.application.getRootNode().getChildren())
.showModelKey(getFacade().getUiFacade().buildKey((Class) this.application.getFirstModelClass())
);
Longer but the showModelWaveBuilder is removed and could be replaced by a simple method returning :
WaveBase.create()
.relatedClass(ShowModelCommand.class)
.waveGroup(CALL_COMMAND)