Feature: Expand/Collapse large chunks of code

When working with large procedures it would be nice to be able to hide large chunks of code by adding something like "--*** this code is valid and of no interest" before and "--/***" after the code block to be hidden
e.g

--***all table definitions needed
create table #tmp_tbla(
fld1 int
, fld2 varchar(5))

create table #...
and so on
--/***

and collapsed
--***all table definitions needed
--/***