Function lilv_node_as_uri 

pub unsafe extern "C" fn lilv_node_as_uri(
    value: *const LilvNode,
) -> *const c_char

Return this value as a URI string, e.g. “http://example.org/foo”. Valid to call only if lilv_node_is_uri(value) returns true. Returned value is owned by value and must not be freed by caller.