Create a method that converts a Decimal number to an Integer. The method should handle the conversion by truncating the decimal part (removing any digits after the decimal point).

Examples:

Input: 5.7 Output: 5 Explanation: The decimal part (.7) is removed, leaving just 5 Input: 10.2 Output: 10 Explanation: The decimal part (.2) is removed, leaving just 10 Input: -3.8 Output: -3 Explanation: The decimal part (.8) is removed, leaving just -3
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