Parameters
__namedParameters: { 
    left?: ReactNode; 
    onPressHeaderLeft: (() => void); 
    onPressHeaderRight: ((selectedUsers) => Promise<void>); 
    right?: ReactNode; 
    shouldActivateHeaderRight?: ((selectedUsers) => boolean); 
}
Optional left?: ReactNode
onPressHeaderLeft: (() => void)
onPressHeaderRight: ((selectedUsers) => Promise<void>)
- (selectedUsers): Promise<void>
 Returns Promise<void>
Optional right?: ReactNode
Optional shouldActivateHeaderRight?: ((selectedUsers) => boolean)
- (selectedUsers): boolean
 Returns boolean
Returns Element