set_meta

Description:

public abstract bool set_meta (string name, string tag, string? value)

Sets a new value for an existing meta data item or adds a new item.

Meta data tag names can be something like e.g. "comment". Supplying null for the value will unset an existing value.

this	a Object that implements Preset
name	preset name
tag	meta data item name
value	new value

true for success, false if e.g. there is no preset with that name