Enum DropLine 

#[non_exhaustive]
pub enum DropLine<'a, R: GridRow> {
    Row {
        key: &'a R::Key,
        branch: Option<Branch>,
    },
    Caption(GroupInfo<'a>),
    Empty,
}

The line under a drag over the rows.

Variants (Non-exhaustive)

Non-exhaustive enums could have additional variants added in future. Therefore, when matching against variants of non-exhaustive enums, an extra wildcard arm must be added to account for any future variants.

Row

A data row; branch is set for a tree row with shown children.

Fields

key: &'a R::Key

The row’s key.

branch: Option<Branch>

The row’s children, in a tree.

Caption(GroupInfo<'a>)

A group caption.

Empty

Below the last row, a row fading out, or an empty grid.