some api methods

plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/api/auxiliary/GrCondition.java

@@ -24,5 +24,4 @@ import org.jetbrains.plugins.groovy.lang.psi.GroovyPsiElement;
  * @author ilyas
  */
 public interface GrCondition extends GroovyPsiElement {
-  public static final GrCondition[] EMPTY_ARRAY = new GrCondition[0];
 }

plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/api/statements/GrLoopStatement.java

@@ -23,7 +23,6 @@ import org.jetbrains.plugins.groovy.lang.psi.api.auxiliary.GrCondition;
  * @author ilyas
  */
 public interface GrLoopStatement extends GrStatement {
-
   GrCondition replaceBody (GrCondition statement) throws IncorrectOperationException;
-  GrCondition getBody();
+  GrStatement getBody();
 }

plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/api/statements/GrVariableDeclaration.java

@@ -34,4 +34,6 @@ public interface GrVariableDeclaration extends GrStatement, GrMembersDeclaration
 
   @Nullable
   GrTypeElement getTypeElementGroovyForVariable(GrVariable var);
+
+  GrTupleDeclaration getTupleDeclaration();
 }

plugins/groovy/src/org/jetbrains/plugins/groovy/lang/psi/impl/statements/GrVariableDeclarationBase.java

@@ -115,7 +115,11 @@ public abstract class GrVariableDeclarationBase extends GrStubElementBase<EmptyS
 
   @Override
   public boolean isTuple() {
-    return findChildByClass(GrTupleDeclaration.class) != null;
+    return getTupleDeclaration() != null;
+  }
+
+  public GrTupleDeclaration getTupleDeclaration() {
+    return findChildByClass(GrTupleDeclaration.class);
   }
 
   @Override
@@ -173,18 +177,13 @@ public abstract class GrVariableDeclarationBase extends GrStubElementBase<EmptyS
       return "Multiple variable definitions";
     }
 
-    @NotNull
-    public GrTupleDeclaration getTuple(){
-      return findChildByClass(GrTupleDeclaration.class);
-    }
-
     @Nullable
     public GrExpression getInitializerGroovy(){
       return findChildByClass(GrExpression.class);
     }
 
     public GrVariable[] getVariables() {
-      return getTuple().getVariables();
+      return getTupleDeclaration().getVariables();
     }
 
     public GrMember[] getMembers() {