IGlobalButtonVisibilityRule
An object rule to control the visibility of specific buttons or actions available on an object type.
            
                
Determines if Mass Delete is displayed on object list page, or if the delete button is displayed on
            the object's view page.
            
Determines if the Link button  displays on associative objects lists added to the layout of another object 
            associated by a multiple or single object field to the current object type.
            
Determines if New and Mass Copy are displayed on object list page, if Save and New is available
            on object edit page, and if New is available on child or associative lists of this object type.
            
Determines if the Unlink button displays on associative objects lists added to the layout of another object
            associated by a multiple or single object field to the current object type.