code: public boolean isColumnVisible(CmsResourceTableProperty propertyId) {
  
          return Arrays.asList(m_fileTable.getVisibleColumns()).contains(propertyId)
              && !m_fileTable.isColumnCollapsed(propertyId);
      }
docs: Returns if the column with the given property id is visible and not collapsed.<p>
  
  @param propertyId the property id
  
  @return <code>true</code> if the column is visible