Ya it's built into the codewars enviornment only so you may not be able to access it through the use of your own editor (VSC/Atom/etc.)

Using codewars for the different languages you can access the library using the note left by the creator. Since I primarily use JS all I did was console.log(MORSE_CODE) to view the entire object to see what was what.

I hope this helps. Here's the note the creator left for all of the different languages.

NOTE: For coding purposes you have to use ASCII characters . and -, not Unicode characters.

The Morse code table is preloaded for you as a dictionary, feel free to use it:

Coffeescript/C++/Go/JavaScript/Julia/PHP/Python/Ruby/TypeScript: MORSE_CODE['.--']
C#: MorseCode.Get(".--") (returns string)
Elixir: @morse_codes variable (from use MorseCode.Constants). Ignore the unused variable warning for morse_codes because it's no longer used and kept only for old solutions.
Elm: MorseCodes.get : Dict String String
Haskell: morseCodes ! ".--" (Codes are in a Map String String)
Java: MorseCode.get(".--")
Kotlin: MorseCode[".--"] ?: "" or MorseCode.getOrDefault(".--", "")
Rust: self.morse_code
Scala: morseCodes(".--")
Swift: MorseCode[".--"] ?? "" or MorseCode[".--", default: ""]
C: provides parallel arrays, i.e. morse[2] == "-.-" for ascii[2] == "C"