TODO

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x base class function completion
* support moose type constraint completion
* support for class::accessor::fast accessor completion (with r,w attribute)
* grouping rule 
    :to be able to disable/enable specified group (extension)
* template declare completion extension
* class variable completion
* exported function completion
* support class method completion from 'isa', for example:

        has handle =>
            isa => 'DBI::Handle';

        $self->handle->

* completion priority
* completion dictionary components
    - for loading completion data instead of parsing , eg:
            [completion item]\t[preview]\t[type] ...