How to use the @fluentui/react.SpinnerSize.large function in @fluentui/react

return (
        <>
            <h2>Groups</h2>
             {
                    return {
                        ...group,
                        createdDate: group.createdDate.toLocaleString(),
                        updatedDate: group.updatedDate.toLocaleString(),
                        isActive: group.isActive.toString()
                    };
                })}
                columns={columns}
                layoutMode={DetailsListLayoutMode.justified}
            /&gt;
            {data.isFetching &amp;&amp; }
        
    );
};

<div>
            <header>
              <h1>Rin</h1>
            </header>
            <div>
              
                
              
              {!appStore.connected &amp;&amp; (
                &lt;&gt;
                  
                    
                  
                
              )}
            </div>
          </div>
        
      
    );
  }
}