PickerFilter
What the finder lists of the entries (definition-picker-library §DPLA-1 to §DPLA-4): the caller's kinds, the source, the categories and tags the dropdown leaves checked, Flat, and "Has errors".
In the namespace construct::ui. Declared in src/libs/libconstruct/construct/ui/DefinitionPickerSearch.hpp.
Detailed description
unchecked holds the family keys and the tag keys (pickerTagKey()) that the user unchecked, so a new family or tag shows by default. Tags filter only when some tags are checked and some are not: then a row must hold a checked tag. With every tag checked or none, tags do not filter.