patch 7.4.2298
Problem: It is not possible to close the "in" part of a channel.
Solution: Add ch_close_in().
diff --git a/src/proto/channel.pro b/src/proto/channel.pro
index 1acae9a..869989c 100644
--- a/src/proto/channel.pro
+++ b/src/proto/channel.pro
@@ -27,6 +27,7 @@
char *channel_status(channel_T *channel);
void channel_info(channel_T *channel, dict_T *dict);
void channel_close(channel_T *channel, int invoke_close_cb);
+void channel_close_in(channel_T *channel);
void channel_clear(channel_T *channel);
void channel_free_all(void);
char_u *channel_read_block(channel_T *channel, int part, int timeout);