Hello,
Well, it seems to match the output but it's not validating. At this point I don't really know where is the problem for validation.
package com.codegym.task.task25.task2503;
public interface Columnable {
/**
* @return full column name
*/
String getColumnName();
/**
* Returns true if the column is visible, otherwise false
*/
boolean isShown();
/**
* Hides the column by marking it with -1 in the realOrder array.
* Shifts the indices of the visible columns that come after the hidden column
*/
void hide();
/**
* Returns the constant's ordinal number in the enum.
*
* @return the constant's ordinal number in the enum
*/
int ordinal();
}