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: protobuf_for_benchmark.rs
    path of file: ./repos/flutter_rust_bridge/frb_example/pure_dart/rust/src/auxiliary
    
    the code of the file until where you have to start completion: // This file is generated by rust-protobuf 2.28.0. Do not edit
// @generated

// https://github.com/rust-lang/rust-clippy/issues/702
#![allow(unknown_lints)]
#![allow(clippy::all)]

#![allow(unused_attributes)]
#![cfg_attr(rustfmt, rustfmt::skip)]

#![allow(box_pointers)]
#![allow(dead_code)]
#![allow(missing_docs)]
#![allow(non_camel_case_types)]
#![allow(non_snake_case)]
#![allow(non_upper_case_gl
    
    fn merge_from(&mut self, is: &mut ::protobuf::CodedInputStream<'_>) -> ::protobuf::ProtobufResult<()> {
        while !is.eof()? {
            let (field_number, wire_type) = is.read_tag_unpack()?;
            match field_number {
                1 => {
                    ::protobuf::rt::read_singular_proto3_bytes_into(wire_type, is, &mut self.first)?;
                },
                2 => {
                    ::protobuf::rt::read_singular_proto3_bytes_into(wire_type, is, &mut self.second)?;
                },
                3 => {
                    ::protobuf::rt::read_singular_proto3_bytes_into(wire_type, is, &mut self.third)?;
                },
                _ => {
                    ::protobuf::rt::read_unknown_or_skip_group(field_number, wire_type, is, self.mut_unknown_fields())?;
                },
            };
        }
        ::std::result::Result::Ok(())
    }