How to use the @patternfly/patternfly/utilities/Accessibility/accessibility.css.visibleOnLg function in @patternfly/patternfly

{item.title ? item.title : utils.Icap(key)}
                      
                    
                  );
                })}
              
            );
          })}
        
      
    );
    const PageToolbar = (
      
        
          
            <button aria-label="Toggle Connect Form" id="connectButton">
              
            </button>
          
          
             (this.notificationRef = el)}
              suppress={this.state.suppress}
            /&gt;

const { isUserDropdownOpen, isHelpDropdownOpen, showAboutModal } = this.state;

    const logoProps = {
      onClick: () => this.onTitleClick()
    };

    const gsUrl =
      'https://access.redhat.com/documentation/en-us/red_hat_managed_integration/1/html-single/getting_started/';
    const riUrl =
      'https://access.redhat.com/documentation/en-us/red_hat_managed_integration/1/html-single/release_notes/';
    const csUrl = 'https://access.redhat.com/support/';

    const MastheadToolbar = (
      
        
          
            
              <button aria-label="Settings">
                
              </button>

showBreadcrumb,
      }}
    >