code: public <T extends Permissionable & DiscordEntity> ServerChannelUpdater addPermissionOverwrite(
              T permissionable, Permissions permissions) {
          delegate.addPermissionOverwrite(permissionable, permissions);
          return this;
      }
docs: Adds a permission overwrite for the given entity.
  
  @param <T> The type of entity to hold the permission, usually <code>User</code> or <code>Role</code>
  @param permissionable The entity whose permissions should be overwritten.
  @param permissions The permission overwrites.
  @return The current instance in order to chain call methods.