import type { OpenAPIV3 } from 'openapi-types';
import type { OpenApiAllOfSchema, OpenApiAnyOfSchema, OpenApiArraySchema, OpenApiEnumSchema, OpenApiNotSchema, OpenApiObjectSchema, OpenApiOneOfSchema, OpenApiReferenceSchema, OpenApiSchema, OpenApiSchemaProperties, SchemaNaming } from './openapi-types';
import type { SchemaRefMapping } from './parser';
/**
 * Collect all unique reference schemas within the given schemas.
 * @param schemas - Parsed schemas to retrieve all references for.
 * @returns Returns a list of unique reference schemas within the given schemas.
 * @internal
 */
export declare function collectRefs(...schemas: (OpenApiSchema | undefined)[]): OpenApiReferenceSchema[];
/**
 * Reduce a list of reference schemas to a list of unique reference schemas, based on $ref.
 * @param refs - List of reference schemas.
 * @returns List of unique reference schemas.
 * @internal
 */
export declare function getUniqueRefs(refs: OpenApiReferenceSchema[]): OpenApiReferenceSchema[];
/**
 * Type guard to check whether an object is of type `OpenAPIV3.ReferenceObject`.
 * @param obj - Object to check.
 * @returns `true` if the object is a reference object, `false` otherwise.
 * @internal
 */
export declare function isReferenceObject(obj: any): obj is OpenAPIV3.ReferenceObject;
/**
 * Type guard to check whether an object is of type `OpenApiArraySchema`.
 * @param obj - Object to check.
 * @returns `true` if the object is an array schema, `false` otherwise.
 * @internal
 */
export declare function isArraySchema(obj: any): obj is OpenApiArraySchema;
/**
 * Type guard to check whether an object is of type `OpenApiObjectSchema`.
 * @param obj - Object to check.
 * @returns `true` if the object is an object schema, `false` otherwise.
 * @internal
 */
export declare function isObjectSchema(obj: any): obj is OpenApiObjectSchema;
/**
 * Type guard to check whether an object is of type `OpenApiEnumSchema`.
 * @param obj - Object to check.
 * @returns `true` if the object is an enum schema, `false` otherwise.
 * @internal
 */
export declare function isEnumSchema(obj: any): obj is OpenApiEnumSchema;
/**
 * Type guard to check whether an object is of type `OpenApiOneOfSchema`.
 * @param obj - Object to check.
 * @returns `true` if the object is an oneOf schema, `false` otherwise.
 * @internal
 */
export declare function isOneOfSchema(obj: any): obj is OpenApiOneOfSchema;
/**
 * Type guard to check whether an object is of type `OpenApiAllOfSchema`.
 * @param obj - Object to check.
 * @returns `true` if the object is an allOf schema, `false` otherwise.
 * @internal
 */
export declare function isAllOfSchema(obj: any): obj is OpenApiAllOfSchema;
/**
 * Type guard to check whether an object is of type `OpenApiAnyOfSchema`.
 * @param obj - Object to check.
 * @returns `true` if the object is an anyOf schema, `false` otherwise.
 * @internal
 */
export declare function isAnyOfSchema(obj: any): obj is OpenApiAnyOfSchema;
/**
 * Type guard to check whether an object is of type `OpenApiNotSchema`.
 * @param obj - Object to check.
 * @returns `true` if the object is a not schema, `false` otherwise.
 * @internal
 */
export declare function isNotSchema(obj: any): obj is OpenApiNotSchema;
/**
 * Parse the type name of a reference object.
 * @param obj - Reference object to get the type name from.
 * @param schemaRefMapping - Mapping between reference paths and schema names.
 * @returns Parsed type name.
 * @internal
 */
export declare function getSchemaNamingFromRef(obj: OpenAPIV3.ReferenceObject | string, schemaRefMapping: SchemaRefMapping): SchemaNaming;
/**
 * @internal
 */
export declare function getSchemaPropertiesDocumentation(schemaProperties: OpenApiSchemaProperties): string[];