Refactor Wall class into JS prototype
Refactor Wall class into JS prototype

gvsi/LibraryMapping,charlotteyizhang/LibraryMapping,charlotteyizhang/LibraryMapping,gvsi/LibraryMapping,charlotteyizhang/LibraryMapping,UoEMainLibrary/LibraryMapping,UoEMainLibrary/LibraryMapping,UoEMainLibrary/LibraryMapping,gvsi/LibraryMapping