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: virtualpg.rb
    path of file: ./repos/homebrew-core/Formula/v
    
    the code of the file until where you have to start completion: class Virtualpg < Formula
  desc "Loadable dynamic extension for SQLite and SpatiaLite"
  homepage "https://www.gaia-gis.it/fossil/virtualpg/index"
  url "https://www.gaia-gis.it/gaia-sins/virtualpg-2.0.1.tar.gz"
  sha256 "be2aebeb8c9ff274382085f51d422e823858bca4f6bc2fa909816464c6a1e08b"
  license "MPL-1.1"

  livecheck do
    url :homepage
    regex(/href=.*?virtualpg[._-]v?(\d+(?:\.\d+)+)\.t/i)
  end

  bottle do
    sha256 cellar: :any,               
    
  def install
    # New SQLite3 extension won't load via SELECT load_extension('mod_virtualpg');
    # unless named mod_virtualpg.dylib (should actually be mod_virtualpg.bundle)
    # See: https://groups.google.com/forum/#!topic/spatialite-users/EqJAB8FYRdI
    # needs upstream fixes in both SQLite and libtool
    inreplace "configure",
              "shrext_cmds='`test .$module = .yes && echo .so || echo .dylib`'",
              "shrext_cmds='.dylib'"

    system "./configure", "--enable-shared=yes",
                          "--disable-dependency-tracking",
                          "--with-pgconfig=#{Formula["postgresql@14"].opt_bin}/pg_config",
                          "--prefix=#{prefix}"
    system "make", "install"
  end