Get all functions on an object and its prototype chain (so we don't miss any class methods or any
object methods). Note that the functions on the final item in the prototype chain (i.e., Object)
are skipped to avoid including functions like __defineGetter__, __defineSetter__, toString,
etc.
Parameters
obj: {[property:string]:unknown}
Object whose functions to get
_objId: string = 'obj'
Optional ID of the object to use for debug logging
Get all functions on an object and its prototype chain (so we don't miss any class methods or any object methods). Note that the functions on the final item in the prototype chain (i.e., Object) are skipped to avoid including functions like
__defineGetter__,__defineSetter__,toString, etc.