er may be an input
parameter and another may be an output parameter.  For example, the
<A HREF="../../../com/sleepycat/db/Database.html#get(com.sleepycat.db.Transaction, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.LockMode)"><CODE>Database.get(com.sleepycat.db.Transaction, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.DatabaseEntry, com.sleepycat.db.LockMode)</CODE></A> method has an input key parameter and an output
data parameter.  The documentation for each method 