This is a function inside its own environment. This enables a bunch of
functions to be manipulated outside the package, even when they are called
from function within the dendextend package.
TODO: describe options.
A new "warn" dendextend_options parameter. logical (FALSE). Should warning be issued?
Usage
dendextend_options(option, value)
Arguments
option
a character scalar of the value of the options we would
like to access or update.
value
any value that we would like to update into the "option"
element in dendextend_options