code: @Override
  	public boolean isKeyColumn(String columnName) {
  		for ( String keyColumName : getColumnNames() ) {
  			if ( keyColumName.equals( columnName ) ) {
  				return true;
  			}
  		}
  
  		return false;
  	}
docs: Whether the given column is part of this key family or not.
  
  @return {@code true} if the given column is part of this key, {@code false} otherwise.