anchor.diff:  %% Short for "environment value", just provides some sugar for
   %% grabbing config values
   -define(EV(Key), application:get_env(sqerl, Key)).
  +-define(EVD(Key, Default), case application:get_env(sqerl, Key) of
  +                               undefined -> {ok, Default};
  +                               V -> V
  +                           end).
   
   start(_StartType, _StartArgs) ->
   
       {ok, DbType} = ?EV(db_type),
  -
  -    %% Unsure where this gets used
  -    {ok, _MetricsModule} = ?EV(metrics_module),
   
       {ok, Host} = ?EV(host),
       {ok, Port} = ?EV(port),
  
positive.code: 
      {ok, MaxPoolSize} = ?EV(max_count),
      {ok, InitPoolSize} = ?EV(init_count),
  
      PoolerConfig = [[{name, "sqerl"},
                       {max_count, MaxPoolSize},
  
negative.code:                                                               {user, User},
                                                                {pass, Password},
                                                                {db, Database},
                                                                {idle_check, IdleCheck},
                                                                {prepared_statement_source, PreparedStatements},
                                                                {column_transforms, ColumnTransforms}]]}}]],
      sqerl_sup:start_link(PoolerConfig).
  