Summary: This implements `EventHandlers` abstract class (aka "Events Guy") which encapsulates `eventDispatcher` and `instanceHandle` (and ownership of future `eventTarget`), all of this as part of existing {ShadowNode + Props + LayoutMetrics + LocalData + Descriptor + (and now) EventHandlers} infra. (We don't plan to add anything else to this model. Ever.)
Reviewed By: fkgozali
Differential Revision: D8053351
fbshipit-source-id: 1dd9ccbcbe5a2eb284b59ea351dc8beca645e8bf
Summary: Each app has its own set of components to support, so this mechanism allows each of them to customize the set. Core library only provides the signature (.h file) without any impl.
Reviewed By: shergin
Differential Revision: D8065360
fbshipit-source-id: c123397afda678e84f1d1fa41a6393f25b2c15e1
Valentin Shergin
Kevin Gozali