<p> This interface represents a guard, which is an object that is used
to protect access to another object.
<p>This interface contains a single method, {@code checkGuard},
with a single {@code object} argument. {@code checkGuard} is
invoked (by the GuardedObject {@code getObject} method)
to determine whether or not to allow access to the object.
Determines whether or not to allow access to the guarded object
{@code object}. Returns silently if access is allowed.
Otherwise, throws a SecurityException.
<p> This interface represents a guard, which is an object that is used to protect access to another object.
<p>This interface contains a single method, {@code checkGuard}, with a single {@code object} argument. {@code checkGuard} is invoked (by the GuardedObject {@code getObject} method) to determine whether or not to allow access to the object.
@see GuardedObject
@author Roland Schemers @author Li Gong