class Seahorse::Model::Shapes::Shape

def [](key)

Gets metadata for the given `key`. 
def [](key)
  @metadata[key.to_s]
end

def []=(key, value)

Sets metadata for the given `key`. 
def []=(key, value)
  @metadata[key.to_s] = value
end

def initialize 

def initialize
  @metadata = {}
end