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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