public void setClean() {
    dirty = false;
  }
Clears the inner dirty flag.
<p>This implies the inner map becomes shareable between instances (see #copy()).</p>
<p>This should only be called after a save()/write().</p>
standalone-metastore/metastore-common/src/main/java/org/apache/hadoop/hive/metastore/properties/PropertyMap.java