<html> <head> <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"> </head> <body text="#000000" bgcolor="#FFFFFF"> Phil already discussed what happens in that situation. Now from a practical point of view, regarding Smalltalk way, the right move is to propose to the JSON package maintainer to add your class side method readFromString: to the JSON package. After all, if you find this added method is convenient to read Json files, it is likely to be convenient for other users of the JSON package. If the package maintainer does not agree, I don't know. May be the safest way will be to subclass Json in your own package and add the methods you need. Best Hilaire <div class="moz-cite-prefix">Le 14/08/2021 à 19:46, Nicola Mingotti via Cuis-dev a écrit : </div> <blockquote type="cite" cite="mid:b48084a8-5ae2-1484-179a-7fb504962845@gmail.com">I defined a method in my package 'Wunderbar', it is 'readFromString', which goes into class 'Json class side' and method category '*Wunderbar-DB'. Now, suppose a day in the future I upgrade Cuis and 'readFromString' is now defined into 'Json class'. What will happen when i try to load 'Wunderbar' package ? . Do i get an error for method name overlap ? . If not, is there any criteria by which one method should be called instead of the other for example: looking at which method category it belongs to ? </blockquote> <pre class="moz-signature" cols="72">-- GNU Dr. Geo <a class="moz-txt-link-freetext" href="http://drgeo.eu">http://drgeo.eu</a> <a class="moz-txt-link-freetext" href="http://blog.drgeo.eu">http://blog.drgeo.eu</a></pre> </body> </html>