public final boolean contains(T tt) {
      return lookup(getDbName(tt), getTableName(tt)) != null;
    }
Checks whether a given table is present in this set.
@param tt the table to check
@return true if the set contains an item having the same database and table name
ql/src/java/org/apache/hadoop/hive/ql/security/authorization/plugin/HivePrivilegeObjectUtils.java