From e7e2870a096b810e7637fb25a8eea57c0320c164 Mon Sep 17 00:00:00 2001
From: Xianda Sun <sunxdt@gmail.com>
Date: Tue, 1 Oct 2024 21:04:35 +0100
Subject: [PATCH] fix more doc example error

---
 docs/src/state_interface.md | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/docs/src/state_interface.md b/docs/src/state_interface.md
index 299001c..782f5bf 100644
--- a/docs/src/state_interface.md
+++ b/docs/src/state_interface.md
@@ -185,6 +185,8 @@ end
 It is very simple to implement the samplers according to the `AbstractMCMC` interface, where we can use `LogDensityProblems.logdensity` to easily read the log probability of the current state.
 
 ```@example gibbs_example
+abstract type AbstractMHSampler <: AbstractMCMC.AbstractSampler end
+
 """
     RandomWalkMH{T} <: AbstractMCMC.AbstractSampler