From 99e1e037ba46f2d99b14b03bcd2417a8964328bc Mon Sep 17 00:00:00 2001
From: icweaver <weaveric@gmail.com>
Date: Tue, 4 Nov 2025 16:04:57 -0800
Subject: [PATCH] make struct immutable

---
 src/spectrum.jl | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/spectrum.jl b/src/spectrum.jl
index d636cd3..c1a20f9 100644
--- a/src/spectrum.jl
+++ b/src/spectrum.jl
@@ -3,7 +3,7 @@
 
 A 1-dimensional spectrum stored as vectors of real numbers. The wavelengths are assumed to be in angstrom.
 """
-mutable struct Spectrum{W <: Number,F <: Number} <: AbstractSpectrum{W,F}
+struct Spectrum{W <: Number,F <: Number} <: AbstractSpectrum{W,F}
     wave::Vector{W}
     flux::Vector{F}
     meta::Dict{Symbol,Any}