diff --git a/denops_std/function/_generated.ts b/denops_std/function/_generated.ts
index a6c2f2ce..a54289e8 100644
--- a/denops_std/function/_generated.ts
+++ b/denops_std/function/_generated.ts
@@ -134,45 +134,6 @@ export function append(denops: Denops, ...args: unknown[]): Promise<unknown> {
   return denops.call("append", ...args);
 }
 
-/**
- * Like `append()` but append the text in buffer **{buf}**.
- *
- * This function works only for loaded buffers. First call
- * `bufload()` if needed.
- *
- * For the use of **{buf}**, see `bufname()`.
- *
- * **{lnum}** is the line number to append below.  Note that using
- * `line()` would use the current buffer, not the one appending
- * to.  Use "$" to append at the end of the buffer.  Other string
- * values are not supported.
- *
- * On success 0 is returned, on failure 1 is returned.
- * In `Vim9` script an error is given for an invalid **{lnum}**.
- *
- * If **{buf}** is not a valid buffer or **{lnum}** is not valid, an
- * error message is given. Example:
- *
- *     :let failed = appendbufline(13, 0, "# THE START")
- *
- * Can also be used as a `method` after a List, the base is
- * passed as the second argument:
- *
- *     mylist->appendbufline(buf, lnum)
- */
-export function appendbufline(
-  denops: Denops,
-  buf: unknown,
-  lnum: unknown,
-  text: unknown,
-): Promise<number>;
-export function appendbufline(
-  denops: Denops,
-  ...args: unknown[]
-): Promise<unknown> {
-  return denops.call("appendbufline", ...args);
-}
-
 /**
  * The result is the number of files in the argument list.  See
  * `arglist`.
@@ -1175,37 +1136,6 @@ export function delete_(denops: Denops, ...args: unknown[]): Promise<unknown> {
   return denops.call("delete_", ...args);
 }
 
-/**
- * Delete lines **{first}** to **{last}** (inclusive) from buffer **{buf}**.
- * If **{last}** is omitted then delete line **{first}** only.
- * On success 0 is returned, on failure 1 is returned.
- *
- * This function works only for loaded buffers. First call
- * `bufload()` if needed.
- *
- * For the use of **{buf}**, see `bufname()` above.
- *
- * **{first}** and **{last}** are used like with `getline()`. Note that
- * when using `line()` this refers to the current buffer. Use "$"
- * to refer to the last line in buffer **{buf}**.
- *
- * Can also be used as a `method`:
- *
- *     GetBuffer()->deletebufline(1)
- */
-export function deletebufline(
-  denops: Denops,
-  buf: unknown,
-  first: unknown,
-  last?: unknown,
-): Promise<number>;
-export function deletebufline(
-  denops: Denops,
-  ...args: unknown[]
-): Promise<unknown> {
-  return denops.call("deletebufline", ...args);
-}
-
 /**
  * Returns `TRUE` when autocommands are being executed and the
  * FileType event has been triggered at least once.  Can be used
diff --git a/denops_std/function/buffer.ts b/denops_std/function/buffer.ts
index 8bd80d31..8cb5edcc 100644
--- a/denops_std/function/buffer.ts
+++ b/denops_std/function/buffer.ts
@@ -49,6 +49,41 @@ export interface GetBufInfoDictArg {
   bufmodified?: boolean;
 }
 
+/**
+ * Like `append()` but append the text in buffer **{buf}**.
+ *
+ * This function works only for loaded buffers. First call
+ * `bufload()` if needed.
+ *
+ * For the use of **{buf}**, see `bufname()`.
+ *
+ * **{lnum}** is the line number to append below.  Note that using
+ * `line()` would use the current buffer, not the one appending
+ * to.  Use "$" to append at the end of the buffer.  Other string
+ * values are not supported.
+ *
+ * On success 0 is returned, on failure 1 is returned.
+ * In `Vim9` script an error is given for an invalid **{lnum}**.
+ *
+ * If **{buf}** is not a valid buffer or **{lnum}** is not valid, an
+ * error message is given. Example:
+ *
+ *     :let failed = appendbufline(13, 0, "# THE START")
+ *
+ * Can also be used as a `method` after a List, the base is
+ * passed as the second argument:
+ *
+ *     mylist->appendbufline(buf, lnum)
+ */
+export async function appendbufline(
+  denops: Denops,
+  buf: BufNameArg,
+  lnum: BufLnumArg,
+  text: string | string[],
+): Promise<number> {
+  return await denops.call("appendbufline", buf, lnum, text) as number;
+}
+
 /**
  * Add a buffer to the buffer list with name **{name}** (must be a
  * String).
@@ -295,6 +330,33 @@ export async function bufwinnr(
   return await denops.call("bufwinnr", buf) as number;
 }
 
+/**
+ * Delete lines **{first}** to **{last}** (inclusive) from buffer **{buf}**.
+ * If **{last}** is omitted then delete line **{first}** only.
+ * On success 0 is returned, on failure 1 is returned.
+ *
+ * This function works only for loaded buffers. First call
+ * `bufload()` if needed.
+ *
+ * For the use of **{buf}**, see `bufname()` above.
+ *
+ * **{first}** and **{last}** are used like with `getline()`. Note that
+ * when using `line()` this refers to the current buffer. Use "$"
+ * to refer to the last line in buffer **{buf}**.
+ *
+ * Can also be used as a `method`:
+ *
+ *     GetBuffer()->deletebufline(1)
+ */
+export async function deletebufline(
+  denops: Denops,
+  buf: BufNameArg,
+  first: BufLnumArg,
+  last?: BufLnumArg,
+): Promise<number> {
+  return await denops.call("deletebufline", buf, first, last) as number;
+}
+
 /**
  * Get information about buffers as a List of Dictionaries.
  *