Package analysis provides methods to work with a Swagger specification document from package go-openapi/spec. An analysed specification object (type Spec) provides methods to work with swagger definition. Flattening a specification bundles all remote $ref in the main spec document. Depending on flattening options, additional preprocessing may take place: Mixin several specifications merges all Swagger constructs, and warns about found conflicts. Unmarshalling a specification with golang [json] unmarshalling may lead to some unwanted result on present but empty fields. Swagger schemas are analyzed to determine their complexity and qualify their content.