Certain class names must be all lowercase (as opposed to following PEP8 recommendation of CamelCase) due to an assumption in the framework that builds method names dynamically with the assumption of all lowercase class names as a part of the method name. Refer to https://gerrit.akraino.org/r/gitweb?p=ta/config-manager.git;a=blob;f=cmdatahandlers/src/cmdatahandlers/api/configmanager.py;h=e4aa72d470c8359288e34b50f35ba168e4b03c93;hb=HEAD#l99 for the code where the domain handler function names are built based on the handlers located in https://gerrit.akraino.org/r/gitweb?p=ta/config-manager.git;a=tree;f=cmdatahandlers/src/cmdatahandlers;hb=HEAD which results in the method names having to match the case of the directory names.