public boolean isOnlyRemovals() {
      return m_onlyRemovals;
    }
Gets whether the only changes included for this configuration type are
removals (or there are no changes at all of any kind). If there are any
additions or modifications, this will be {@code false}.

@return whether there are only removals in this change request, or if
        there are also additions or modifications to properties.
ambari-server-spi/src/main/java/org/apache/ambari/spi/upgrade/UpgradeActionOperations.java