pub trait AvroMapAccess {
    type R: AvroRead;
    // Required method
    fn next_entry<'b>(
        &'b mut self,
    ) -> Result<Option<(String, AvroFieldAccess<'b, Self::R>)>, AvroError>;
}pub trait AvroMapAccess {
    type R: AvroRead;
    // Required method
    fn next_entry<'b>(
        &'b mut self,
    ) -> Result<Option<(String, AvroFieldAccess<'b, Self::R>)>, AvroError>;
}