iiop-openjdk/src/main/java/org/wildfly/iiop/openjdk/rmi/ContainerAnalysis.java
protected boolean isMutator(Method m) {
        // JBAS-4473, look for set<name>()
        String name = m.getName();
        if (!(name.startsWith("set") && name.length() > "set".length()))
            return false;
        if (m.getReturnType() != Void.TYPE)
            return false;
        if (m.getParameterTypes().length != 1)
            return false;
        return hasNonAppExceptions(m);
    }
protected boolean isMutator(Method m) {
        // JBAS-4473, look for set<name>()
        String name = m.getName();
        if (!(name.startsWith("set") && name.length() > "set".length()))
            return false;
        if (m.getReturnType() != Void.TYPE)
            return false;
        if (m.getParameterTypes().length != 1)
            return false;
        return hasNonAppExceptions(m);
    }
Check if a method is a mutator.