question: public static String parseFunction ( String functionCall ) throws FBSQLParseException { functionCall = functionCall . trim ( ) ; checkSyntax ( functionCall ) ; int parenthesisStart = functionCall . indexOf ( '(' ) ; return parenthesisStart != - 1 ? functionCall . substring ( 0 , parenthesisStart ) : functionCall ; }
target:  Extract function name from the function call.