drools-eclipse/org.guvnor.eclipse.webdav/src/kernel/org/eclipse/webdav/internal/kernel/utils/Assert.java
static public void isNotNull(Object o, String message) {
        if (o == null)
            throw new AssertionFailedException(Policy.bind("assert.null", message)); //$NON-NLS-1$
    }
static public void isNotNull(Object o, String message) {
        if (o == null)
            throw new AssertionFailedException(Policy.bind("assert.null", message)); //$NON-NLS-1$
    }
Asserts that the given object is not <code>null</code>. If this
is not the case, some kind of unchecked exception is thrown.
The given message is included in that exception, to aid debugging.