Creates a variable of type Collection and adds listed items to it

Matches ::: paragrafo6o par123 par 89 par.21...

Insert GROUP BY statement for parameter (if there is already another "GROUP BY")

Insert GROUP BY statement for a parameter (if no previous "GROUP BY" is present)

Insert GROUP BY statement for parameter (if there is no "GROUP BY" yet)

Trim repeating characters at start and end, e.g. "//strip me$$" becomes "/strip me$"