Implement library access restrictions and privacy.

tests/co19/co19-kernel.status

Index: tests/co19/co19-kernel.status
diff --git a/tests/co19/co19-kernel.status b/tests/co19/co19-kernel.status
index afc1efb087c620ef81ba25bcc485e78b773aa171..80dac613653becb111061b13fa1b25057ad00829 100644
--- a/tests/co19/co19-kernel.status
+++ b/tests/co19/co19-kernel.status
@@ -95,7 +95,6 @@ Language/Expressions/Function_Invocation/Unqualified_Invocation/instance_context
 Language/Expressions/Instance_Creation/Const/arguments_t03: MissingCompileTimeError
 Language/Expressions/Instance_Creation/Const/constant_constructor_name_t02: MissingCompileTimeError
 Language/Expressions/Instance_Creation/Const/constant_constructor_same_name_as_class_t02: MissingCompileTimeError
-Language/Expressions/Instance_Creation/New/evaluation_t06: RuntimeError
 Language/Expressions/Instance_Creation/New/evaluation_t19: RuntimeError # Kernel Issue 28335 (deferred libraries)
 Language/Expressions/Instance_Creation/New/evaluation_t20: RuntimeError # Kernel Issue 28335 (deferred libraries)
 Language/Expressions/Maps/constant_map_t02: MissingCompileTimeError
@@ -171,7 +170,6 @@ Language/Libraries_and_Scripts/definition_syntax_t07: MissingCompileTimeError
 Language/Libraries_and_Scripts/definition_syntax_t08: MissingCompileTimeError
 Language/Libraries_and_Scripts/definition_syntax_t09: MissingCompileTimeError
 Language/Libraries_and_Scripts/definition_syntax_t10: MissingCompileTimeError
-Language/Libraries_and_Scripts/private_access_t03: RuntimeError
 Language/Metadata/before_export_t01: RuntimeError  # Issue 28434: Kernel IR misses these annotations.
 Language/Metadata/before_import_t01: RuntimeError  # Issue 28434: Kernel IR misses these annotations.
 Language/Metadata/before_library_t01: RuntimeError  # Issue 28434: Kernel IR misses these annotations.
@@ -200,10 +198,7 @@ Language/Mixins/Mixin_Application/syntax_t16: CompileTimeError # Issue 25765
 Language/Mixins/declaring_constructor_t05: MissingCompileTimeError # Issue 24767
 Language/Mixins/declaring_constructor_t06: MissingCompileTimeError # Issue 24767
 Language/Overview/Privacy/private_and_public_t06: RuntimeError
-Language/Overview/Privacy/private_and_public_t09: RuntimeError
-Language/Overview/Privacy/private_and_public_t10: RuntimeError
-Language/Overview/Privacy/private_and_public_t19: RuntimeError
-Language/Overview/Privacy/private_and_public_t20: RuntimeError
+Language/Overview/Privacy/private_and_public_t09: CompileTimeError
 Language/Overview/Scoping/conflicting_names_t35: MissingCompileTimeError
 Language/Overview/Scoping/conflicting_names_t39: MissingCompileTimeError
 Language/Overview/Scoping/conflicting_names_t40: MissingCompileTimeError