### 1.1.61 PropertyUnset

Restore the default setting for a context property. See PropertySet.

Syntax: `\unset context.prop`

Properties:

> `iterator-ctor` (procedure):

>   `ly:property-unset-iterator::constructor`

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

> `name` (symbol):

>   `'PropertyUnset`

>   Name of this music object.

> `types` (list):

>   `'(layout-instruction-event general-music)`

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

#### Internals Reference v2.18.2 (稳定分支).