def format(target):
    """Return the module name of a target if built by Soong, '' otherwise."""
    p = providers(target)
    if not p:
        return ""
    soong_prebuilt_info = p.get(
        "//bazel/rules:soong_prebuilt.bzl%SoongPrebuiltInfo")
    if soong_prebuilt_info:
        return "%s:%s" % (soong_prebuilt_info.module_name, soong_prebuilt_info.platform_flavor)
    return ""