FieldPath
A FieldPath
refers to a field in a document. The path may consist of a
single field name (referring to a top-level field in the document), or a
list of field names (referring to a nested field in the document).
Create a FieldPath
by providing field names. If more than one field
name is provided, the path will point to a nested field in a document.
class FieldPath {}
constructor(...fieldNames: string[]);