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: exitfunk_x64.rb
    path of file: ./repos/metasploit-framework/lib/msf/core/payload/windows/x64
    
    the code of the file until where you have to start completion: # -*- coding: binary -*-

module Msf

###
#
# Implements arbitrary exit routines for Windows ARCH_X64 payloads
#
###

module Payload::Windows::Exitfunk_x64

  def asm_exitfunk(opts={})

    asm = %Q^
     
    
  def asm_exitfunk(opts={})

    asm = %Q^
      exitfunk:
        pop rax               ; won't be returning, realign the stack with a pop
    ^

    case opts[:exitfunk]

    when 'seh'
      asm << %Q^
        push 0                ;
        pop rcx               ; set the exit function parameter
        mov ebx, 0x#{Msf::Payload::Windows.exit_types['seh'].to_s(16)}
        mov r10d, ebx         ; place the correct EXITFUNK into r10d
        call rbp              ; SetUnhandledExceptionFilter(0)
        push 0                ;
        ret                   ; Return to NULL (crash)
      ^

    when 'thread'
      asm << %Q^
        push 0                ;
        pop rcx               ; set the exit function parameter
        mov ebx, 0x#{Msf::Payload::Windows.exit_types['thread'].to_s(16)}
        mov r10d, ebx         ; place the correct EXITFUNK into r10d
        call rbp              ; call EXITFUNK( 0 );
      ^

    when 'process', nil
      asm << %Q^
        push 0                ;
        pop rcx               ; set the exit function parameter
        mov r10, #{Rex::Text.block_api_hash('kernel32.dll', 'ExitProcess')}
        call rbp              ; ExitProcess(0)
      ^

    when 'sleep'
      asm << %Q^
        push 300000           ; 300 seconds
        pop rcx               ; set the sleep function parameter
        mov r10, #{Rex::Text.block_api_hash('kernel32.dll', 'Sleep')}
        call rbp              ; Sleep(30000)
        jmp exitfunk          ; repeat
      ^

    else
      # Do nothing and continue after the end of the shellcode
    end