(part of umbrella issue SOLR-10117)
This adds a field to be declared as "large" in the schema. In the SolrIndexSearcher.doc(...) handling, these fields are lazily fetched from Lucene. Unlike LazyDocument.LazyField, it's not cached after first-use unless the value is "small" < 512KB by default. "large" can only be used when its stored="true" and multiValued="false" and the field is otherwise compatible (basically not a numeric field) – you'll get a helpful exception if it's unsupported. BinaryField is not yet supported at this time; it could be in the future.