/// The error when looking up a value, for example via [`File::try_value()`][crate::File::try_value()].#[derive(Debug, thiserror::Error)]#[allow(missing_docs)]pub enum Error<E> {    #[error(transparent)]    ValueMissing(#[from] existing::Error),    #[error(transparent)]    FailedConversion(E),} ///pub mod existing {    /// The error when looking up a value that doesn't exist, for example via [`File::value()`][crate::File::value()].    #[derive(Debug, thiserror::Error)]    #[allow(missing_docs)]    pub enum Error {        #[error("The requested section does not exist")]        SectionMissing,        #[error("The requested subsection does not exist")]        SubSectionMissing,        #[error("The key does not exist in the requested section")]        KeyMissing,    }}