property :environment_file, [String, Hash]
property :user, String
property :group, String
+property :working_directory, String
property :exec_start_pre, String
property :exec_start, String, :required => true
property :exec_start_post, String
property :private_network, [TrueClass, FalseClass]
property :protect_system, [TrueClass, FalseClass, String]
property :protect_home, [TrueClass, FalseClass, String]
+property :no_new_privileges, [TrueClass, FalseClass]
property :timeout_sec, Integer
property :pid_file, String