docs: def _copySchemaFile(self, src, dst):
          """
          Copy a proto file to the temporary directory, with appropriate
          line replacements
          """
          with open(src) as srcFile, open(dst, 'w') as dstFile:
              srcLines = srcFile.readlines()
              for srcLine in srcLines:
                  toWrite = self._doLineReplacements(srcLine)
                  dstFile.write(toWrite)