Taking source copies is thought to be especially FOR large libraries. You take what you need, leaving the "large" behind...if you can. You probably can. Though,

Taking source copies is thought to be especially FOR large libraries. You take what you need, leaving the "large" behind...if you can. You probably can. Though, libraries are developed with the assumption that they are to be consumed as one massive binary. Making it more difficult to run off with just the part(s) you need.