[DocProcessing] Make access to RUN_STEPS_ATTR more type-safe
diff --git a/redocs/org.eclipse.statet.redocs.tex.r/src/org/eclipse/statet/internal/redocs/tex/r/ui/processing/TexRweaveLaunchDelegate.java b/redocs/org.eclipse.statet.redocs.tex.r/src/org/eclipse/statet/internal/redocs/tex/r/ui/processing/TexRweaveLaunchDelegate.java
index c9af1dc..79cee5f 100644
--- a/redocs/org.eclipse.statet.redocs.tex.r/src/org/eclipse/statet/internal/redocs/tex/r/ui/processing/TexRweaveLaunchDelegate.java
+++ b/redocs/org.eclipse.statet.redocs.tex.r/src/org/eclipse/statet/internal/redocs/tex/r/ui/processing/TexRweaveLaunchDelegate.java
@@ -78,8 +78,7 @@
 			byte runProduce= 0;
 			byte runPreview= 0;
 			
-			final Set<String> steps= configuration.getAttribute(
-					DocProcessingUI.RUN_STEPS_ATTR_NAME, Collections.<String>emptySet() );
+			final Set<String> steps= DocProcessingUI.getRunSteps(configuration);
 			if (steps.isEmpty()) {
 				runWeave= StepConfig.RUN_DEFAULT;
 				runProduce= StepConfig.RUN_DEFAULT;
diff --git a/redocs/org.eclipse.statet.redocs.wikitext.r/src/org/eclipse/statet/internal/redocs/wikitext/r/ui/processing/WikitextRweaveLaunchDelegate.java b/redocs/org.eclipse.statet.redocs.wikitext.r/src/org/eclipse/statet/internal/redocs/wikitext/r/ui/processing/WikitextRweaveLaunchDelegate.java
index 249d328..6a86b3a 100644
--- a/redocs/org.eclipse.statet.redocs.wikitext.r/src/org/eclipse/statet/internal/redocs/wikitext/r/ui/processing/WikitextRweaveLaunchDelegate.java
+++ b/redocs/org.eclipse.statet.redocs.wikitext.r/src/org/eclipse/statet/internal/redocs/wikitext/r/ui/processing/WikitextRweaveLaunchDelegate.java
@@ -80,8 +80,7 @@
 			byte runProduce= 0;
 			byte runPreview= 0;
 			
-			final Set<String> steps= configuration.getAttribute(
-					DocProcessingUI.RUN_STEPS_ATTR_NAME, Collections.<String>emptySet() );
+			final Set<String> steps= DocProcessingUI.getRunSteps(configuration);
 			if (steps.isEmpty()) {
 				runWeave= StepConfig.RUN_DEFAULT;
 				runProduce= StepConfig.RUN_DEFAULT;