A Zsh builtin to indicate how a command would be interpreted. More information: https://keith.github.io/xcode-man-pages/whence.1.html.
command, with expansion if defined as an alias (similar to the command -v builtin):whence "command"
command, with location if defined as a function, or binary (equivalent to the type and command -V builtins):whence -v "command"
which builtin):whence -c "command"
where builtin):whence -ca "command"
PATH for command, ignoring builtins, aliases or shell functions (equivalent to the where command):whence -p "command"