Returns an empty iterable of completions.

  Returns an empty iterable of completions.
Parameters:
- element - {@inheritDoc}
- annotation - {@inheritDoc}
- member - {@inheritDoc}
- userText - {@inheritDoc}

  If the processor class is annotated with SupportedAnnotationTypes, return an unmodifiable set with the same set of strings as the annotation.

  If the processor class is annotated with SupportedAnnotationTypes, return an unmodifiable set with the
same set of strings as the annotation. If the class is not so
annotated, an empty set is returned.
Returns: the names of the annotation types supported by this processor, or an empty set if none

  If the processor class is annotated with SupportedOptions, return an unmodifiable set with the same set of strings as the annotation.

  If the processor class is annotated with SupportedOptions, return an unmodifiable set with the same set
of strings as the annotation. If the class is not so
annotated, an empty set is returned.
Returns: the options recognized by this processor, or an empty set if none

  If the processor class is annotated with SupportedSourceVersion, return the source version in the annotation.

  If the processor class is annotated with SupportedSourceVersion, return the source version in the
annotation. If the class is not so annotated, SourceVersion.RELEASE_6 is returned.
Returns: the latest source version supported by this processor

  Initializes the processor with the processing environment by setting the processingEnv field to the value of the processingEnv argument.

  Initializes the processor with the processing environment by
setting the processingEnv field to the value of the
processingEnv argument. An IllegalStateException will be thrown if this method is called
more than once on the same object.
Parameters:
- processingEnv - environment to access facilities the tool framework provides to the processor
Throws:
- IllegalStateException - if this method is called more than once.

  Returns true if this object has been initialized, false otherwise.

  Returns true if this object has been initialized, false otherwise.
Returns: {@code true} if this object has been initialized, {@code false} otherwise.

  Processes a set of annotation types on type elements originating from the prior round and returns whether or not these annotations are claimed by this processor.

  Processes a set of annotation types on type elements originating from the prior round and returns whether or not these annotations are claimed by this processor. If true is returned, the annotations are claimed and subsequent processors will not be asked to process them; if false is returned, the annotations are unclaimed and subsequent processors may be asked to process them. A processor may always return the same boolean value or may vary the result based on chosen criteria.

The input set will be empty if the processor supports "*" and the root elements have no annotations. A Processor must gracefully handle an empty set of annotations.