public ObjectNode warnIfAdditionalProperties(Collection<String> allowedProperties) {
        try {
            expectNoAdditionalProperties(allowedProperties);
        } catch (ExpectationNotMetException e) {
            LOGGER.warning(e.getMessage() + " (" + getSourceLocation() + ")");
        }
        return this;
    }
Warns if unknown properties are found in object.

@param allowedProperties Properties that may exist.
@return Returns self
smithy-model/src/main/java/software/amazon/smithy/model/node/ObjectNode.java