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: matrix_proxy.rb
    path of file: ./repos/glimmer-dsl-libui/lib/glimmer/libui/control_proxy
    
    the code of the file until where you have to start completion: # Copyright (c) 2021-2024 Andy Maleh
#
# Permission is hereby granted, free of charge, to any person obtaining
# a copy of this software and associated documentation files (the
# "Software"), to deal in the Software without restriction, including
# without limitation the rights to use, copy, modify, merge, publish,
# distribute, sublicense, and/or sell copies of the Software, and to
# permit persons to whom the Sof
    
        def build_control
          @libui = ::LibUI::FFI::DrawMatrix.malloc
          # TODO is there a way to free the memory allocated for this? Or does it get garbage collected automatically?
          if @args.empty?
            set_identity
          else
            @libui.M11 = @args[0].to_f
            @libui.M12 = @args[1].to_f
            @libui.M21 = @args[2].to_f
            @libui.M22 = @args[3].to_f
            @libui.M31 = @args[4].to_f
            @libui.M32 = @args[5].to_f
          end
        end