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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _int_size_to_type(size):
 """ Return the Catalyst datatype from the size of integers. """

    if size <= 8:
        return ByteType
    if size <= 16:
        return ShortType
    if size <= 32:
        return IntegerType
    if size <= 64:
        return LongType