Recursing into child elements, apply PROC to every element of OBJ that matches PRED.

Return a procedure that, when passed a package, grafts its direct and indirect dependencies, including implicit inputs, according to REPLACEMENTS. REPLACEMENTS is a list of package pairs; the first element of each pair is the package to replace, and the second one is the replacement.

Name and version of replacement packages will be padded to meet graft requirement.

Return a copy of package PKG called ALIAS.