Library "catchChecks"
Type Check for Function Builders to allow Single item to be
passed in, and determine what to do with the item, ie: need an x value?
function that allows label, line, box, float, or even a string..
check item type? string ? 'str.tonumber(_item)' can be in the same
switch as a 'line.get_price(_item, bar_index)' both outputting float
or for...