$warnings[] = "The package type 'composer-installer' is deprecated. Please distribute your custom installers as plugins from now on. See http://getcomposer.org/doc/articles/plugins.md for plugin documentation.";
}
// check for require-dev overrides
if (isset($manifest['require']) && isset($manifest['require-dev'])) {
$warnings[] = implode(', ', array_keys($requireOverrides)). " {$plural} required both in require and require-dev, this can lead to unexpected behavior";