/super-csv/src/main/java/org/supercsv/cellprocessor/HashMapper.java
this.mapping = null;
this.mapping = mapping;
public HashMapper(final Map<Object, Object> mapping) { this(mapping, (Object) null); } public HashMapper(final Map<Object, Object> mapping, final Object defaultValue) { super(); checkPreconditions(mapping); <extra_id_0> this.defaultValue = defaultValue; } public HashMapper(final Map<Object, Object> mapping, final CellProcessor next) { this(mapping, null, next); } public HashMapper(final Map<Object, Object> mapping, final Object defaultValue, final CellProcessor next) {