code: def decode_and_add(self, encoded_histogram):
          '''Decode an encoded histogram and add it to this histogram
          Args:
              encoded_histogram (string) an encoded histogram
                  following the V1 format, such as one returned by the encode() method
          Exception:
              TypeError in case of base64 decode error
              HdrCookieException:
                  the main header has an invalid cookie
                  the compressed payload header has an invalid cookie
              HdrLengthException:
                  the decompressed size is too small for the HdrPayload structure
                  or is not aligned or is too large for the passed payload class
              zlib.error:
                  in case of zlib decompression error
          '''
          other_hist = HdrHistogram.decode(encoded_histogram, self.b64_wrap)
          self.add(other_histf decode_and_add(self, encoded_histogram):
          '''Decode an encoded histogram and add it to this histogram
          Args:
              encoded_histogram (string) an encoded histogram
                  following the V1 format, such as one returned by the encode() method
          Exception:
              TypeError in case of base64 decode error
              HdrCookieException:
                  the main header has an invalid cookie
                  the compressed payload header has an invalid cookie
              HdrLengthException:
                  the decompressed size is too small for the HdrPayload structure
                  or is not aligned or is too large for the passed payload class
              zlib.error:
                  in case of zlib decompression error
          '''
          other_hist = HdrHistogram.decode(encoded_histogram, self.b64_wrap)
          self.add(other_hist)
docs: Decode an encoded histogram and add it to this histogram
          Args:
              encoded_histogram (string) an encoded histogram
                  following the V1 format, such as one returned by the encode() method
          Exception:
              TypeError in case of base64 decode error
              HdrCookieException:
                  the main header has an invalid cookie
                  the compressed payload header has an invalid cookie
              HdrLengthException:
                  the decompressed size is too small for the HdrPayload structure
                  or is not aligned or is too large for the passed payload class
              zlib.error:
                  in case of zlib decompression error