Initial implementation for 'search.findElementReferences'.

pkg/analysis_server/lib/src/constants.dart

Index: pkg/analysis_server/lib/src/constants.dart
diff --git a/pkg/analysis_server/lib/src/constants.dart b/pkg/analysis_server/lib/src/constants.dart
index b71b245deb79fb5f3f6a9a639f431beb3e18e587..9612cc407715c3a77179ad44964b417bf7754113 100644
--- a/pkg/analysis_server/lib/src/constants.dart
+++ b/pkg/analysis_server/lib/src/constants.dart
@@ -97,11 +97,14 @@ const String FIXES = 'fixes';
 const String FLAGS = 'flags';
 const String HOVERS = 'hovers';
 const String ID = 'id';
+const String INCLUDE_POTENTIAL = 'includePotential';
 const String INCLUDED = 'included';
 const String INTERFACE_ELEMENTS = 'interfaceElements';
 const String IS_ABSTRACT = 'isAbstract';
+const String IS_POTENTIAL = 'isPotential';
 const String IS_STATIC = 'isStatic';
 const String KIND = 'kind';
+const String LAST = 'last';
 const String LENGTH = 'length';
 const String LOCATION = 'location';
 const String MESSAGE = 'message';
@@ -116,12 +119,14 @@ const String OUTLINE = 'outline';
 const String OVERRIDES = 'overrides';
 const String PARAMETER = 'parameter';
 const String PARAMETERS = 'parameters';
+const String PATH = 'path';
 const String PATTERN = 'pattern';
 const String PROPAGATED_TYPE = 'propagatedType';
 const String REFACTORINGS = 'refactorings';
 const String REGIONS = 'regions';
 const String REMOVED = 'removed';
 const String RETURN_TYPE = 'returnType';
+const String RESULTS = 'results';
 const String SEVERITY = 'severity';
 const String START_COLUMN = 'startColumn';
 const String START_LINE = 'startLine';