code: @Pure
  	public boolean isColumnSelectable(DBaseFileField column) {
  		return column != null && (this.selectedColumns.isEmpty()
  				|| this.selectedColumns.contains(column));
  	}
docs: Replies if the specified column could be replied or ignored.
  
  @param column the column.
  @return <code>true</code> if the given column is selectable, otherwise <code>false</code>