Stubroutine
Sometimes called a stub, null script, or null subroutine, a stubroutine is a small piece of code (or empty space) used as a temporary stand-in for other code. At their core, stubroutines are command scripts whose only function is to return a constant value. Essentially, they are placeholders that allow the rest of a program to be developed and tested before it is completely functional.
Stub routines are often useful with software development when different parts of a program are being worked on simultaneously by different users or teams. Stubroutines simulate the behavior of the missing code or act as a "gap" that allows the other code to function as it should. Once the program's coding is finished or near completion, the stubs are replaced with the proper implements.