From a1bc334fb216c652372dd5c32044c41d6a040a3a Mon Sep 17 00:00:00 2001
From: Marek Kaluba <kalmar@amu.edu.pl>
Date: Wed, 22 Mar 2023 21:43:00 +0100
Subject: [PATCH] make AutomorphismGroup mutable

parent field of an automorphism is now a pointer (i.e. 8 bytes)
---
 src/autgroups.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/autgroups.jl b/src/autgroups.jl
index 2d4ff18..75b8eba 100644
--- a/src/autgroups.jl
+++ b/src/autgroups.jl
@@ -4,7 +4,7 @@ function KnuthBendix.Alphabet(S::AbstractVector{<:GSymbol})
     return Alphabet(S, inversions)
 end
 
-struct AutomorphismGroup{G<:Group,T,RW,S} <: AbstractFPGroup
+mutable struct AutomorphismGroup{G<:Group,T,RW,S} <: AbstractFPGroup
     group::G
     gens::Vector{T}
     rw::RW