@Override
    protected Object execute(Object[] data, State state) {
        return null; //Since the sizeOfSet function takes in only 1 parameter, this method does not get called.
        // Hence, not implemented.
    }
return maximum of arbitrary long set of Double values

@param data  array of Double values
@param state
@return max
modules/siddhi-core/src/main/java/io/siddhi/core/executor/function/SizeOfSetFunctionExecutor.java