Question: Write an arrow function named toggleCase that accepts a string with both lower and upper case letters, and returns a string with the cases reversed:
Write an arrow function named toggleCase that accepts a string with both lower and upper case letters, and returns a string with the cases reversed:
toggleCase('AaBbc') returns "aAbBC"
toggleCase('AoXoMoXoA') returns "aOxOmOxOa"
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