Syntax
set upperCaseString = aString.toUpper() 
set upperCaseString = toUpper(LITERAL)
SemanticsChanges all lower case letters to upper case letters. Returns a new string. The state of the current string is not changed.
SubstitutablesaString Can be any variable or object attribute having the type String.  
LITERAL String literal.
Examples
set upperCaseString = stringSet.s1.toUpper();
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