code: public boolean createUserMappingTable(String mappingTableName) {
  
  		UserMappingTable userMappingTable = UserMappingTable
  				.create(mappingTableName);
  
  		return createUserMappingTable(userMappingTable);
  	}
docs: Create a default user mapping table and extension row if either does not
  exist. When not created, there is no guarantee that an existing table has
  the same schema as the provided tabled.
  
  @param mappingTableName
  user mapping table name
  @return true if table was created, false if the table already existed