public final Integer getInteger(CompoundName name) {
        return getInteger(name, null);
    }
Returns a property as an Integer.

@return the integer value of the name, or null if the property is null
@throws NumberFormatException if the given parameter exists but
                              have a toString which is not parseable as a number
container-core/src/main/java/com/yahoo/processing/request/Properties.java