diff -r 4443157a398a -r b1c31e1707b2 MethodFinderWindow.st
--- a/MethodFinderWindow.st	Mon Sep 16 16:12:44 2019 +0200
+++ b/MethodFinderWindow.st	Fri Sep 27 00:14:49 2019 +0200
@@ -1344,6 +1344,10 @@
     "Created: / 01-06-2012 / 13:16:54 / cg"
 !
 
+selectedImplementorChanged
+    self updateImplementorsOf:selectedImplementorsHolder value
+!
+
 updateImplementorsOf:anInteger 
     "Request the implementors of the selected argument provided by aNumber.
      Return the receiver."
@@ -1541,7 +1545,7 @@
 
     selectedImplementorsHolder isNil ifTrue:[
         selectedImplementorsHolder := ValueHolder new.
-        selectedImplementorsHolder onChangeEvaluate:[self updateImplementorsOf:selectedImplementorsHolder value].
+        selectedImplementorsHolder onChangeSend:#selectedImplementorChanged to:self.
     ].
     ^ selectedImplementorsHolder
 
@@ -1760,62 +1764,65 @@
 !MethodFinderWindow methodsFor:'private'!
 
 argumentEditorsContents
-
-"Determine how many text editors of the arguments are used and store the result
-as argCounter. The result being the minimum between how many editors have
-expressions in and how many are displayed.
+    "Determine how many text editors of the arguments are used and store the result
+    as argCounter. The result being the minimum between how many editors have
+    expressions in and how many are displayed.
 
-Add each argument string (key)and the evaluated version (value) to an Ordered Dictionary
-from each of the text editors.
+    Add each argument string (key)and the evaluated version (value) to an Ordered Dictionary
+    from each of the text editors.
 
-Return the OrderedDictionary with the expressions from all the text editors. "
+    Return the OrderedDictionary with the expressions from all the text editors. "
 
      | tempArguments argCounter tempArgument1Editor tempArgument2Editor tempArgument3Editor
-associationKey associationValue|
+       associationKey associationValue|
+
+    argCounter:=0.
 
-argCounter:=0.
+    tempArgument1Editor:= (self cleanInputs: argument1Editor contents).
+    tempArgument2Editor:=  (self cleanInputs: argument2Editor contents).
+    tempArgument3Editor:= (self cleanInputs: argument3Editor contents).
+
+    tempArgument1Editor = '' ifFalse:[argCounter:=argCounter +1].
+    tempArgument2Editor = '' ifFalse:[argCounter:=argCounter +1].
+    tempArgument3Editor = '' ifFalse:[argCounter:=argCounter +1].
+
+    argCounter:= (argCounter min: (self argCountHolder value -1)).
+    tempArguments:= OrderedDictionary new:argCounter. 
 
-tempArgument1Editor:= (self cleanInputs: argument1Editor contents).
-tempArgument2Editor:=  (self cleanInputs: argument2Editor contents).
-tempArgument3Editor:= (self cleanInputs: argument3Editor contents).
+    (argCounter value >= 1) ifTrue:[
+        associationValue:= (Compiler evaluate: tempArgument1Editor).
+        ((self isExpression:tempArgument1Editor) or:[ associationValue isNil]) ifTrue:[
+            "looks if an expression is typed in"
+            associationKey:=associationValue printString
+        ] ifFalse:[
+            associationKey:=tempArgument1Editor
+        ].
+        tempArguments add: associationKey-> associationValue.
+    ].
+    (argCounter value >= 2) ifTrue:[ 
+        associationValue:= (Compiler evaluate: tempArgument2Editor).
+        (((self isExpression:tempArgument2Editor) or:[ associationValue isNil])) ifTrue:[
+            "looks if an expression is typed in"
+            associationKey:=associationValue printString
+        ] ifFalse:[
+            associationKey:=tempArgument2Editor
+        ].
+        tempArguments add: associationKey-> associationValue
+    ].
 
-tempArgument1Editor = '' ifFalse:[argCounter:=argCounter +1].
-tempArgument2Editor = '' ifFalse:[argCounter:=argCounter +1].
-tempArgument3Editor = '' ifFalse:[argCounter:=argCounter +1].
+    (argCounter value >= 3) ifTrue:[ 
+        associationValue:= (Compiler evaluate: tempArgument3Editor).
+        ((self isExpression:tempArgument3Editor) or:[ associationValue isNil]) ifTrue:[
+            "looks if an expression is typed in"
+            associationKey:=associationValue printString
+        ] ifFalse:[
+            associationKey:=tempArgument3Editor
+        ].
+        tempArguments add: associationKey-> associationValue
+    ].
 
 
-argCounter:= (argCounter min: (self argCountHolder value -1)).
-tempArguments:= OrderedDictionary new:argCounter. 
-
-(argCounter value >= 1) 
-                ifTrue:[associationValue:= (Compiler evaluate: tempArgument1Editor).
-                        ((self isExpression:tempArgument1Editor) or:[ associationValue isNil]) ifTrue:[                  "looks if an expression is typed in"
-                                        associationKey:=associationValue printString]
-                                                          ifFalse:[
-                                        associationKey:=tempArgument1Editor].
-
-                        tempArguments add: associationKey-> associationValue.
-                        ].
-(argCounter value >= 2) 
-                ifTrue:[ associationValue:= (Compiler evaluate: tempArgument2Editor).
-                        (((self isExpression:tempArgument2Editor) or:[ associationValue isNil])) ifTrue:[                  "looks if an expression is typed in"
-                                        associationKey:=associationValue printString]
-                                                          ifFalse:[
-                                        associationKey:=tempArgument2Editor].
-
-                        tempArguments add: associationKey-> associationValue].
-
-(argCounter value >= 3)
-                ifTrue:[ associationValue:= (Compiler evaluate: tempArgument3Editor).
-                        ((self isExpression:tempArgument3Editor) or:[ associationValue isNil]) ifTrue:[                  "looks if an expression is typed in"
-                                        associationKey:=associationValue printString]
-                                                          ifFalse:[
-                                        associationKey:=tempArgument3Editor].
-
-                        tempArguments add: associationKey-> associationValue].
-
-
-^tempArguments
+    ^tempArguments
 !
 
 extractClassAndSelectorFrom:anArgument