@Override
        public boolean equals(Object o) {
            if (this == o) return true;
            if (o == null || getClass() != o.getClass()) return false;

            ConfigSynonym that = (ConfigSynonym) o;
            return Objects.equals(name, that.name) && Objects.equals(value, that.value) && source == that.source;
        }
Returns the source of this configuration.
clients/src/main/java/org/apache/kafka/clients/admin/ConfigEntry.java