Add documentation for disabling _field_names meta-field #26779
Description
The _field_names meta-field can be disabled just like _all. For example:
PUT my_index
{
"mappings": {
"type_1": {
"properties": {...}
},
"type_2": {
"_field_names": {
"enabled": false
},
"properties": {...}
}
}
}
Could documentation be provided for disabling _field_names along with the implications?
https://www.elastic.co/guide/en/elasticsearch/reference/5.6/mapping-field-names-field.html