* @summary Subtract the specified number of days from the given date.
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*
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* @description
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* Subtract the specified number of days from the given date.
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*
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* @typeParam DateType - The `Date` type, the function operates on. Gets inferred from passed arguments. Allows to use extensions like [`UTCDate`](https://github.com/date-fns/utc).
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*
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* @param date - The date to be changed
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* @param amount - The amount of days to be subtracted.
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*
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* @returns The new date with the days subtracted
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*
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* @example
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* // Subtract 10 days from 1 September 2014:
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* const result = subDays(new Date(2014, 8, 1), 10)