You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: truncate.rs
    path of file: ./repos/ruby/yjit/src/asm/arm64/arg
    
    the code of the file until where you have to start completion: // There are many instances in AArch64 instruction encoding where you represent
// an integer value with a 
    
pub fn truncate_uimm<T: Into<u32>, const WIDTH: usize>(uimm: T) -> u32 {
    let value: u32 = uimm.into();
    let masked = value & ((1 << WIDTH) - 1);

    // Assert that we didn't drop any bits by truncating.
    assert_eq!(value, masked);

    masked
}