module Vorpal

Allows easy creation of {Vorpal::Engine} instances.

“‘ruby engine = Vorpal.define do

map Tree do
  attributes :name
  belongs_to :trunk
  has_many :branches
end

map Trunk do
  attributes :length
  has_one :tree
end

map Branch do
  attributes :length
  belongs_to :tree
end

end

mapper = engine.mapper_for(Tree) “‘