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Hi I added the @typescript-eslint/no-floating-promises rule to my code base but why does the following code not error ?

    '@typescript-eslint/no-floating-promises': 'error',

export const sleep = (ms = 3000) =>
  new Promise((resolve) => setTimeout(resolve, ms));

const a =  sleep();

but calling only sleep() errors

    sleep(); // Promises must be awaited

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