pub trait AvroRecordAccess<R: AvroRead> {
    // Required method
    fn next_field<'b>(
        &'b mut self,
    ) -> Result<Option<(&'b str, usize, AvroFieldAccess<'b, R>)>, AvroError>;
}pub trait AvroRecordAccess<R: AvroRead> {
    // Required method
    fn next_field<'b>(
        &'b mut self,
    ) -> Result<Option<(&'b str, usize, AvroFieldAccess<'b, R>)>, AvroError>;
}