Function lilv_plugin_get_optional_features

pub unsafe extern "C" fn lilv_plugin_get_optional_features(
    plugin: *const LilvPlugin,
) -> *mut LilvNodes

Get the LV2 Features optionally supported by a plugin. Hosts MAY ignore optional plugin features for whatever reasons. Plugins MUST operate (at least somewhat) if they are instantiated without being passed optional features.

Return value must be freed by caller with lilv_nodes_free().