propertyNames property
It is optional.
It will perform histogram for all the property names if it is not set. The properties need to be defined with the is_filterable flag set to true and the name of the property should be in the format: "schemaId.propertyName". The property needs to be defined in the schema. Example: the schema id is abc. Then the name of property for property MORTGAGE_TYPE will be "abc.MORTGAGE_TYPE".
Implementation
core.List<core.String>? propertyNames;