No limitation on the number of item at this level. It has already been checked when preparing the query parameters
## custom mods
# Base class. Declares default vhost on port 80 and default ssl
# vhost on port 443 listening on all interfaces and serving
# $apache::docroot, and declaring a custom set of modules.
class { 'apache':
default_mods => [
'info',
'alias',
'mime',
'env',
'setenv',
'expires',
],
}