Behind the scenes, the JFrog plugin executes a Gradle script, which creates the dependencies tree of the project. The plugin reads the Gradle configuration defined in Eclipse. This configuration is added to Eclipse by the Buildship plugin You can access this configuration by going in Preferences | Gradle | Gradle distribution
If the Gradle configuration is not set, then Gradle Wrapper will be used. If the project does not include the Gradle Wrapper configuration, Gradle will be automatically downloaded.