@@ -23,13 +23,6 @@ interface CompressionOptions {
 level: number;
 }
 
-interface Metadata {
-percent: number;
-currentFile: string | null;
-}
-
-type OnUpdateCallback = (metadata: Metadata) => void;
-
 interface InputByType {
 base64: string;
 string: string;
@@ -71,6 +64,13 @@ declare namespace JSZip {
 
 type OutputType = keyof OutputByType;
 
+interface JSZipMetadata {
+percent: number;
+currentFile: string | null;
+}
+
+type OnUpdateCallback = (metadata: JSZipMetadata) => void;
+
 interface JSZipObject {
 name: string;
 /**
@@ -170,11 +170,6 @@ declare namespace JSZip {
 decodeFileName?: (bytes: string[] | Uint8Array | Buffer) => string;
 }
 
-interface JSZipMetadata {
-percent: number;
-currentFile: string;
-}
-
 type DataEventCallback<T> = (dataChunk: T, metadata: JSZipMetadata) => void
 type EndEventCallback = () => void
 type ErrorEventCallback = (error: Error) => void
@@ -287,7 +282,7 @@ interface JSZip {
 * @param onUpdate The optional function called on each internal update with the metadata.
 * @return The serialized archive
 */
-generateAsync<T extends JSZip.OutputType>(options?: JSZip.JSZipGeneratorOptions<T>, onUpdate?: OnUpdateCallback): Promise<OutputByType[T]>;
+generateAsync<T extends JSZip.OutputType>(options?: JSZip.JSZipGeneratorOptions<T>, onUpdate?: JSZip.OnUpdateCallback): Promise<OutputByType[T]>;
 
 /**
 * Generates a new archive asynchronously
@@ -296,7 +291,7 @@ interface JSZip {
 * @param onUpdate The optional function called on each internal update with the metadata.
 * @return A Node.js `ReadableStream`
 */
-generateNodeStream(options?: JSZip.JSZipGeneratorOptions<'nodebuffer'>, onUpdate?: OnUpdateCallback): NodeJS.ReadableStream;
+generateNodeStream(options?: JSZip.JSZipGeneratorOptions<'nodebuffer'>, onUpdate?: JSZip.OnUpdateCallback): NodeJS.ReadableStream;
 
 /**
 * Generates the complete zip file with the internal stream implementation