Elements. Deprecate UriReferencedElement.

Change-Id: Ia74e6ab4ea6935897c0d137d67da9c916e691eca
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/418927
Reviewed-by: Paul Berry <[email protected]>
Commit-Queue: Konstantin Shcheglov <[email protected]>

Author: scheglov

pkg/analyzer/api.txt

@@ -3227,7 +3227,6 @@ package:analyzer/dart/element/element.dart:
     TYPE_PARAMETER (static getter: ElementKind)
     UNIVERSE (static getter: ElementKind)
     values (static getter: List<ElementKind>)
-    of (static method: ElementKind Function(Element?))
     new (constructor: ElementKind Function(String, int, String))
     displayName (getter: String)
     name (getter: String)
@@ -3522,7 +3521,7 @@ package:analyzer/dart/element/element.dart:
     typeParameters (getter: List<TypeParameterElement>, deprecated)
   UndefinedElement (class extends Object implements Element, deprecated):
     new (constructor: UndefinedElement Function())
-  UriReferencedElement (class extends Object implements _ExistingElement):
+  UriReferencedElement (class extends Object implements _ExistingElement, deprecated):
     new (constructor: UriReferencedElement Function())
     uri (getter: String?)
     uriEnd (getter: int)
@@ -3538,7 +3537,7 @@ package:analyzer/dart/element/element.dart:
     name (getter: String)
     type (getter: DartType)
     computeConstantValue (method: DartObject? Function())
-  _ExistingElement (class extends Object implements Element):
+  _ExistingElement (class extends Object implements Element, deprecated):
     new (constructor: _ExistingElement Function())
     declaration (getter: Element, deprecated)
     library (getter: LibraryElement, deprecated)

pkg/analyzer/lib/dart/element/element.dart

@@ -1000,18 +1000,6 @@ class ElementKind implements Comparable<ElementKind> {
 
   @override
   String toString() => name;
-
-  /// Returns the kind of the given [element], or [ERROR] if the element is
-  /// `null`.
-  ///
-  /// This is a utility method that can reduce the need for null checks in
-  /// other places.
-  static ElementKind of(Element? element) {
-    if (element == null) {
-      return ERROR;
-    }
-    return element.kind;
-  }
 }
 
 /// The location of an element within the element model.
@@ -2318,6 +2306,7 @@ abstract class UndefinedElement implements Element {}
 /// An element included into a library using some URI.
 ///
 /// Clients may not extend, implement or mix-in this class.
+@Deprecated('Use Element2 instead')
 abstract class UriReferencedElement implements _ExistingElement {
   /// The URI that is used to include this element into the enclosing library,
   /// or `null` if this is the defining compilation unit of a library.
@@ -2385,6 +2374,7 @@ abstract class VariableElement implements Element, ConstantEvaluationTarget {
 
 /// This class exists to provide non-nullable overrides for existing elements,
 /// as opposite to artificial "multiply defined" element.
+@Deprecated('Use Element2 instead')
 @AnalyzerPublicApi(
     message: 'Exposed because it is implemented by various elements')
 abstract class _ExistingElement implements Element {

pkg/analyzer/lib/src/dart/element/element.dart

@@ -11751,9 +11751,10 @@ mixin TypeParameterizedElementMixin on ElementImpl
   }
 }
 
-/// A concrete implementation of a [UriReferencedElement].
 abstract class UriReferencedElementImpl extends _ExistingElementImpl
-    implements UriReferencedElement {
+    implements
+        // ignore:deprecated_member_use_from_same_package
+        UriReferencedElement {
   /// The offset of the URI in the file, or `-1` if this node is synthetic.
   int _uriOffset = -1;