void function ( ) { }
allows one-time initialization before any mapping . this method is called before any mapping of a unit but only once in the beginning . if not overwritten does nothing . concode_field_sep Hashtable<Object,Object> unitToResult concode_field_sep Set entrySet concode_elem_sep boolean containsKey concode_elem_sep Collection<Object> values concode_elem_sep void clear concode_elem_sep boolean isEmpty concode_elem_sep boolean containsValue concode_elem_sep Object put concode_elem_sep Object remove concode_elem_sep int size concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep Object get concode_elem_sep void putAll concode_elem_sep Object mapTo concode_elem_sep void map concode_elem_sep Set<Object> keySet