Returns a specifier for the object or objects to be moved.
- macOS 10.0+
A specifier for the object or objects to be moved.
Note that this specifier may be different than the specifier set by
set, which sets the container specifier. For example, for a command such as
move the third circle to the location of the first circle, the receiver might identify a document (which has a list of graphics), while the key specifier identifies the particular graphic to be moved.