module SassC::Script

def self.custom_functions(functions: Functions)
  functions.public_instance_methods
end

def self.formatted_function_name(function_name, functions: Functions)
  params = functions.instance_method(function_name).parameters
  params = params.map { |param_type, name| "$#{name}#{': null' if param_type == :opt}" }.join(", ")
  return "#{function_name}(#{params})"
end