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## Package opencard.core.util

Interface Summary
APDUTracer | Interface used to trace the communication with a smart card
OpenCardConfigurationProvider | `OpenCardConfigurationProvider` is the general interface that has to be implemented by concrete classes that are to set OpenCard's properties.
TraceLevels | Constants used by `Tracer`.

Class Summary
HexString | Small utility class to hexify bytes and shorts.
SystemAccess | Singleton that provides access to protected system resources like file I/O, properties, native code.
Tracer | Utility class for tracing.

Exception Summary
OpenCardPropertyLoadingException |

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