set_label
  
  Description:
  [ 
Version ( since = 
"0.4.0" ) ]
public void set_label (
string? label)
  
 
  
    Sets the label property to label.
    Set label to null to unset the property in the category.
    Parameters:
    
      
        | this | 
        
           a Category 
         | 
      
      
        | label | 
        
           the new label for the category, or null 
         |