class ReeSwagger::BuildSerializerSchema

def call(mapper)
  if mapper.type
    return get_serializer_definition(mapper.type, method(:call).to_proc)
  end
  properties = mapper.fields.each_with_object({}) do |(_name, field), acc|
    swagger_field = {}
    field_mapper = field.type
    swagger_type = call(field_mapper)
    swagger_field.merge!(swagger_type) if swagger_type
    description = field.doc
    swagger_field[:description] = description if description
    swagger_field[:nullable] = true if field.null
    acc[field.name] = swagger_field
  end
  {
    type: 'object',
    properties: properties
  }
end