the pointcut expression
We allow "" as default for abstract pointcut
Default:
""
argNames
public abstract java.lang.String argNames
When compiling without debug info, or when interpreting pointcuts at runtime,
the names of any arguments used in the pointcut are not available.
Under these circumstances only, it is necessary to provide the arg names in
the annotation - these MUST duplicate the names used in the annotated method.
Format is a simple comma-separated list.
Returns:
argNames the argument names (should match those in the annotated method)