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: kernel_elf.rb
    path of file: ./repos/rust-raspberrypi-OS-tutorials/20_timer_callbacks/tools/kernel_symbols_tool
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

# SPDX-License-Identifier: MIT OR Apache-2.0
#
# Copyright (c) 2021-2023 Andre Richter <andre.o.ric
    
    def fetch_values(kernel_symbols_section, num_kernel_symbols)
        sym = @symtab_section.symbol_by_name(num_kernel_symbols)
        raise "Symbol \"#{num_kernel_symbols}\" not found" if sym.nil?

        @num_kernel_symbols = sym

        section = @elf.section_by_name(kernel_symbols_section)
        raise "Section \"#{kernel_symbols_section}\" not found" if section.nil?

        @kernel_symbols_section = section
    end