public static FuncDeclNode Get(FuncDeclEquatable funcDeclEquatable)
		{
			foreach (FuncDeclNode decl in declarations_)
				if (decl.Equatable.Equals(funcDeclEquatable))
					return decl;
			return null;
		}
		public static bool Contains(FuncDeclEquatable funcDeclEquatable)
		{
			foreach (FuncDeclNode decl in declarations_)
				if (decl.Equatable.Equals(funcDeclEquatable))
					return true;
			return false;
		}