Question: What is the expected behavior of the getSecuredDataLength() method in case of an unavailable SMS TPDU TLV, USSD String TLV element, or Cell Broadcast Page Comprehension TLV?
Option 1: Return a default length value (e.g., 0) to indicate unavailability.
Option 2: Throw ToolkitException.UNAVAILABLE_ELEMENT.
Option 3: Attempt to retrieve the length from an alternative data source.
Option 4: Return an error code via the method's return type (short).
Explanation: According to context errors defined for the getSecuredDataLength() method, in scenarios where the required TLV is unavailable, the method handles this by throwing a specific exception, ensuring explicit error handling and informing the caller of unavailability. Thus, throwing ToolkitException.UNAVAILABLE_ELEMENT is the correct behavior, aligning with defined error handling practices for unavailable elements.