LilyPond Internals Reference: 3.1.146 TieColumn

### 3.1.146 `TieColumn`

An auxiliary grob to determine direction and shape of stacked `Tie` grobs.

`TieColumn` objects are created by: `Completion_heads_engraver` and `Tie_engraver`.

Standard settings:

`before-line-breaking` (boolean):

  `ly:tie-column::before-line-breaking`

  Dummy property, used to trigger a callback function.

`X-extent` (pair of numbers):

  `#f`

  Extent (size) in the X direction, measured in staff-space units, relative to object’s reference point.

`Y-extent` (pair of numbers):

  `#f`

  Extent (size) in the Y direction, measured in staff-space units, relative to object’s reference point.

This object supports the following interface(s): `grob-interface`, `spanner-interface` and `tie-column-interface`.

This object is of class Spanner (characterized by `spanner-interface`).

#### LilyPond – Internals Reference v2.24.4 (stable-branch).