Common callbacks

There are 3 common callbacks in the project :

Name	Type description	Description
SimpleCallback	(error : Error) => void	Can give an error
ReturnCallback<T>	(error : Error, data : T) => void	Can give an error or a data of type T
Return2Callback<T, Q>	(error : Error, x : T, y : Q) => void	Can give an error or a tuple of x and y of type T and Q

TypeScript

export type SimpleCallback = (error : Error) => void
export type ReturnCallback<T> = (error : Error, data : T) => void
export type Return2Callback<T, Q> = (error : Error, x : T, y : Q) => void