.findVariableDescriptorOrFail(entity, variableName);
beforeVariableChanged(variableDescriptor, entity);
}
public final void afterVariableChanged(Object entity, String variableName) {
VariableDescriptor variableDescriptor = getSolutionDescriptor()
.findVariableDescriptorOrFail(entity, variableName);
afterVariableChanged(variableDescriptor, entity);
}