question: @ SuppressWarnings ( "unchecked" ) public PseudoFunctionSelector ( String functionName , String expression ) { super ( Type . PSEUDO_FUNCTION ) ; this . pseudoFunction = ( PseudoFunction < E > ) lookupPseudoFunction ( functionName . trim ( ) ) ; this . expression = expression ; this . parsedExpression = pseudoFunction . parseExpression ( expression ) ; }
target:  Creates pseudo function selector for given function and expression.