What result objects contain

The query builder API supports two types of queries:

Entity queries – Result objects contain a list of references to instances of the primary entity type for the query. You set up an entity query with the select method that takes no arguments. For example:
```
query.select()
```
Row queries – Result objects contain a set of row-like structures with values fetched from or computed by the relational database. You set up a row query by passing a Gosu array of column selections to the select method. For example:
```
query.select({
  QuerySelectColumns.path(Paths.make(Person#Subtype)),
  QuerySelectColumns.pathWithAlias("FName", Paths.make(Person#FirstName)),
  QuerySelectColumns.pathWithAlias("LName", Paths.make(Person#LastName))
})
```