InterfaceDecl ::= <Original:TypeDecl> BodyDecl*;- Type Hierarchy:
 java.lang.Object
beaver.Symbol
      
AST.ASTNode<ASTNode>
          
AST.TypeDecl
              
AST.ReferenceType
                  
AST.InterfaceDecl
                      
AST.InterfaceDeclSubstituted
- All Implemented Interfaces:
 - MemberSubstitutor, Parameterization, SimpleSet, VariableScope, java.lang.Cloneable, java.lang.Iterable<ASTNode>, java.util.Iterator