pub struct NullDataSource;
Expand description
A DataSource
that returns no data points.
Implementations§
Source§impl NullDataSource
impl NullDataSource
Sourcepub fn new() -> NullDataSource
pub fn new() -> NullDataSource
Constructs a new instance of NullDataSource
.
Trait Implementations§
Auto Trait Implementations§
impl Freeze for NullDataSource
impl RefUnwindSafe for NullDataSource
impl Send for NullDataSource
impl Sync for NullDataSource
impl Unpin for NullDataSource
impl UnwindSafe for NullDataSource
Blanket Implementations§
Source§impl<T> BorrowMut<T> for Twhere
T: ?Sized,
impl<T> BorrowMut<T> for Twhere
T: ?Sized,
Source§fn borrow_mut(&mut self) -> &mut T
fn borrow_mut(&mut self) -> &mut T
Mutably borrows from an owned value. Read more