From 43e218bb93dd299204a28a2baf782557784ee82c Mon Sep 17 00:00:00 2001
From: Sebastian Henz <sebastian.henz@ufz.de>
Date: Tue, 18 Aug 2020 17:41:51 +0200
Subject: [PATCH] Fix bug that causes plot functions to visibly return NULL,
 closes #51

---
 DESCRIPTION       | 4 ++--
 R/plot_stress.R   | 2 +-
 R/plot_survival.R | 2 +-
 3 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/DESCRIPTION b/DESCRIPTION
index 8763904..0d88936 100644
--- a/DESCRIPTION
+++ b/DESCRIPTION
@@ -1,8 +1,8 @@
 Package: stressaddition
 Type: Package
 Title: Modelling Tri-Phasic Concentration-Response Relationships
-Version: 3.0.1
-Date: 2020-07-29
+Version: 3.0.2
+Date: 2020-08-18
 Authors@R: c(person("Sebastian", 
                     "Henz", 
                     role = c("aut", "cre"), 
diff --git a/R/plot_stress.R b/R/plot_stress.R
index 52cce5b..f3dfd0b 100644
--- a/R/plot_stress.R
+++ b/R/plot_stress.R
@@ -194,5 +194,5 @@ plot_stress <- function(model,
             )
         }
     }
-    NULL  # suppress all possible return values
+    invisible(NULL)  # suppress all possible return values
 }
diff --git a/R/plot_survival.R b/R/plot_survival.R
index 39a7613..f99d9fb 100644
--- a/R/plot_survival.R
+++ b/R/plot_survival.R
@@ -175,5 +175,5 @@ plot_survival <- function(model,
             )
         }
     }
-    NULL  # suppress all possible return values
+    invisible(NULL)  # suppress all possible return values
 }
-- 
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