DocumentProviderFactory function ( ) { return instance ; }
retrieve the unique instance of the factory . concode_field_sep DocumentProviderFactory instance concode_elem_sep String[] providerNames concode_elem_sep IDocumentProvider[] providers concode_field_sep IDocumentProvider getDefaultProvider concode_elem_sep Set<OnSharedPreferenceChangeListener> getChangeListeners concode_elem_sep IDocumentProvider getProvider concode_elem_sep void initialize concode_elem_sep String[] getNames