Re: Line breaking, simple-spacer, etc.

[Boris Shingarov]

Quoting Joe Neeman <address@hidden>:

> We create lots of extra grobs (eg. a BarNumber at every bar line) but
> most of them are not drawn. See the break-visibility property in
> item-interface. 

Thanks Joe, this explanation does help a lot. 
I hope I am not abusing your (and the list's) patience by asking 
another question:

In define-markup-commands.scm, there are references to things like 
wordwrap-internal-markup-list and make-wordwrap-internal-markup-list.  
For example, in the function define-builtin-markup-list-command, there 
is the application (make-wordwrap-internal-markup-list #t args). 
I can not find where these functions are defined.  Grepping the whole 
source tree only yields occurrences where they are applied.  I presume 
there must be some sort of dynamic building of the name and binding it 
to the the body (also there is the question then, how is the body 
constructed)?