BE_StackCount ( name )
A stack is an internal plugin storage type, where you push data into a stack ( like a list of values ) and Pop data out. In the plugin, stacks are LIFO ( Last In First Out ) so when you push a value onto the named stack, it will be the next value to POP out of the stack.
This function returns a count of the total number of values remaining in stack name.
Version : 4.1
name : the name of the stored stack. Stacks have names, much like variables do.
Result : a count of the values. Doesn't alter the content of name at all. Returns 0 for a stack that doesn't exist, or is empty.