Performs a deep merge of source into target. Mutates target only but not its objects and arrays.
source
target
Rest
inspired from https://gist.github.com/ahtcx/0cd94e62691f539160b32ecda18af3d6#gistcomment-3120712
Performs a deep merge of
source
intotarget
. Mutatestarget
only but not its objects and arrays.