class Seahorse::Model::Shapes::StructureShape

def add_member(name, shape_ref)
  name = name.to_sym
  @required << name if shape_ref.required
  @members_by_location_name[shape_ref.location_name] = [name, shape_ref]
  @members[name] = shape_ref
end

def initialize(options = {})
  @members = {}
  @members_by_location_name = {}
  @required = Set.new
  super
end

def member(name)
  if member?(name)
    @members[name.to_sym]
  else
    raise ArgumentError, "no such member #{name.inspect}"
  end
end

def member?(member_name)
  @members.key?(member_name.to_sym)
end

def member_by_location_name(location_name)
  @members_by_location_name[location_name]
end

def member_names
  @members.keys
end

def members
  @members.to_enum
end