Note: information on this page refers to Ceylon 1.0, not to the current release.

optional annotation

The optional annotation is applied to module imports which are not strictly required by the module.

Usage 

module com.example.foo "1.0" {
    optional import org.example.bar "4.5.1";
}

Description

An optional dependency will be loaded by the module runtime if it is available, but no error will occur if it is not available.

See also