@Test
    void Get_CloudKey_ValueMissing_ThrowsException() {
        // Act & Assert
        assertThrows(NullPointerException.class, () -> this.context.get(cloudKey("foo", String.class)));
    }
Tests for {@link CloudKeyContainer} using {@link CommandContext}.
cloud-core/src/test/java/org/incendo/cloud/key/CloudKeyContainerTest.java