@Test
    public void resolve_noInterpolatorStringLookupForARegularFileOrBase64Variable() {
        environment.set("base64", "foo");
        environment.set("file", "foo");
        assertThat(resolve("${base64}"), equalTo("foo"));
        assertThat(resolve("${file}"), equalTo("foo"));
    }
Ensures that prefixes in the secret ID which are not covered by the CasC protocol substitutors (e.g. base64:, file:)
are left untouched and not removed.
plugin/src/test/java/io/jenkins/plugins/casc/SecretSourceResolverTest.java