public PrivilegeGrantInfoBuilder setGrantor(String grantor) {
    this.grantor = grantor;
    return this;
  }
Builder for {@link PrivilegeGrantInfo}.  The privilege is required.  If not provided the grantor
is
assumed to be the current user.  This is really intended for use by the
{@link HiveObjectPrivilegeBuilder}.
standalone-metastore/metastore-server/src/main/java/org/apache/hadoop/hive/metastore/client/builder/PrivilegeGrantInfoBuilder.java