can't leak private type error and how i fixed it

private_type_leak.rs

pub fn insert_details(handle: Connection, details: &Details) -> Vec<Result<i32>>{
    let dris = details.detail_record_ids;
    //Check if the corresponding detailrecord entries are present in DetailRecord table
    dris.iter().map(|detail_record| {
        //Break and err if one of the insert fails
        handle.execute("INSERT INTO Details (detail_record_ids) VALUES (?1)",&[&detail_record.id])
    }).collect()
}

//Following error
error[E0446]: private type `Details<'_>` in public interface
   --> src/main.rs:155:1
    |
155 | / pub fn insert_details(handle: Connection, details: &Details) -> Vec<Result<i32>>{
156 | |     let dris = details.detail_record_ids;
157 | |     //Check if the corresponding detailrecord entries are present in DetailRecord table
158 | |     dris.iter().map(|detail_record| {
...   |
161 | |     }).collect()
162 | | }
    | |_^ can't leak private type


//Error fixed by removing pub key word for the function.