what is the syntax (i.e. code example) in Lua so you can call a function prior to it being defined? i.e. how do you kind of create the function, but then add it's implementation further down in code.

So roughly like this:

• define function name (doX) here somehow (i.e. subject of this question)
• call doX here (further down in the code)
• doX implemention here (i.e. all functions down at the bottom of the file)