LilyPond Internals Reference: 1.1.10 BarCheck

### 1.1.10 `BarCheck`

Check whether this music coincides with the start of the measure.

Properties:

`iterator-ctor` (procedure):

  `ly:bar-check-iterator::constructor`

  Function to construct a `music-event-iterator` object for this music.

`name` (symbol):

  `'BarCheck`

  Name of this music object.

`types` (list):

      '(bar-check)

  The types of this music object; determines by what engraver this music expression is processed.

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