Fix Event Bus for null exception (#7360)
Fix Event Bus for null exception (#7360)

EventsInterceptor fails when it tries to locate a generic method on an implementation with a return type. A null check has been added to avoid the exception.

Fixes #4718 
Dixes #4584
Dolphinsimon/Orchard,grapto/Orchard.CloudBust,abhishekluv/Orchard,fassetar/Orchard,omidnasri/Orchard,gcsuk/Orchard,jimasp/Orchard,Fogolan/OrchardForWork,yersans/Orchard,jimasp/Orchard,Fogolan/OrchardForWork,gcsuk/Orchard,Codinlab/Orchard,li0803/Orchard,Codinlab/Orchard,gcsuk/Orchard,Dolphinsimon/Orchard,ehe888/Orchard,omidnasri/Orchard,Fogolan/OrchardForWork,jersiovic/Orchard,abhishekluv/Orchard,li0803/Orchard,IDeliverable/Orchard,jimasp/Orchard,Lombiq/Orchard,OrchardCMS/Orchard,OrchardCMS/Orchard,LaserSrl/Orchard,Fogolan/OrchardForWork,IDeliverable/Orchard,grapto/Orchard.CloudBust,yersans/Orchard,grapto/Orchard.CloudBust,jimasp/Orchard,Codinlab/Orchard,aaronamm/Orchard,LaserSrl/Orchard,fassetar/Orchard,li0803/Orchard,aaronamm/Orchard,ehe888/Orchard,ehe888/Orchard,gcsuk/Orchard,Dolphinsimon/Orchard,aaronamm/Orchard,LaserSrl/Orchard,tobydodds/folklife,Lombiq/Orchard,jimasp/Orchard,jersiovic/Orchard,abhishekluv/Orchard,abhishekluv/Orchard,Dolphinsimon/Orchard,yersans/Orchard,fassetar/Orchard,Fogolan/OrchardForWork,tobydodds/folklife,tobydodds/folklife,grapto/Orchard.CloudBust,omidnasri/Orchard,jersiovic/Orchard,omidnasri/Orchard,tobydodds/folklife,ehe888/Orchard,hbulzy/Orchard,tobydodds/folklife,Codinlab/Orchard,IDeliverable/Orchard,jersiovic/Orchard,abhishekluv/Orchard,yersans/Orchard,Codinlab/Orchard,Lombiq/Orchard,omidnasri/Orchard,li0803/Orchard,IDeliverable/Orchard,LaserSrl/Orchard,Lombiq/Orchard,grapto/Orchard.CloudBust,ehe888/Orchard,omidnasri/Orchard,omidnasri/Orchard,hbulzy/Orchard,LaserSrl/Orchard,aaronamm/Orchard,omidnasri/Orchard,tobydodds/folklife,yersans/Orchard,omidnasri/Orchard,gcsuk/Orchard,fassetar/Orchard,li0803/Orchard,IDeliverable/Orchard,jersiovic/Orchard,aaronamm/Orchard,hbulzy/Orchard,OrchardCMS/Orchard,abhishekluv/Orchard,grapto/Orchard.CloudBust,OrchardCMS/Orchard,OrchardCMS/Orchard,Lombiq/Orchard,fassetar/Orchard,hbulzy/Orchard,hbulzy/Orchard,Dolphinsimon/Orchard