IndexReader reader = IndexReader.open(indexWriter, true);
HashedStringFieldType type = new HashedStringFieldType(new HashedStringFieldData.HashedStringTypeLoader(0,0, null, null));
MultiValueHashedStringFieldData sFieldData = (MultiValueHashedStringFieldData) type.load(reader, "mvalue");
assert (sFieldData.fieldName().equals("mvalue"));
assert (sFieldData.multiValued());
assertThat(sFieldData.collisions(),equalTo(0));