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: main.rs
    path of file: ./repos/kani/tests/coverage/unreachable/break
    
    the code of the file until where you have to start completion: // Copyright Kani Contributors
// SPDX-License-Identifier: Apache-2.0 OR MIT

fn find_positive(nums: &[i32]) -> Option<i32
    
fn find_positive(nums: &[i32]) -> Option<i32> {
    for &num in nums {
        if num > 0 {
            return Some(num);
        }
    }
    // This part is unreachable if there is at least one positive number.
    None
}