pub const FANNING_OUT_TYPES: [&str; 4];Expand description
Datatypes whose conversion to index values emits more than one entry for a single value, so a path that selects exactly one of them still produces several index entries.
This mirrors the per-type arms of indexing_conversion in
haste-fhir-search: a HumanName becomes its text, family, every given,
every prefix and every suffix; a CodeableConcept becomes one token per
coding. Changing a converter to fan out — encoding an Identifier as both
system|value and bare value, say — means adding its type here, or the
generated table starts claiming parameters are singular when their values
are being dropped.