Fixed test
Added Syncable interface
Fixed
Fixed syncable interface
Fixed global variants
Fixed sync method implements
Added TaskPayload#sync
Updated UI
Removed .only
Removed an unused class
Fixed hiding private members
Fixed private members
Added Emitter
Merge branch 'dev' into sched-spike
Added event 'end'
Added Task chain
Updated tests
Fixed Node interface
Updated error messages
Fixed TaskContext#wait