dub for lib & app?

[mark]

Is it possible to create a dub project that has one library and 
one or more executables (that use the library)? If so, could 
someone point me to the docs for this since I couldn't find this 
in the dub docs?

Aside: I'm learning D to give me something approaching the 
convenience of Python with the fast executable that I'd get with 
Rust. I love Rust's cargo tool, but find that Rust is very 
frustrating to do prototyping or experimentation whereas D seems 
easy for these purposes. But dub does seem a bit basic (or maybe 
I just haven't found the right docs).