Delete all of the keys in the inputLabels.

Delete all keys that have the passed in prefix.

Returns a map where only the keys that have the input prefix are kept.

Adds all of the key/values in additions to destination.

Adds all of the keys/values in additions to destination Each key in addition will be modified by having prefix prepended to it.

Label represents a Key/Value pair label.

Function that modifies an input string.