} else {
          val dynamicTableIndex = dynamicTableIndex(index - STATIC_HEADER_TABLE.size)
          if (dynamicTableIndex < 0 || dynamicTableIndex >= dynamicTable.size) {
            throw IOException("Header index too large ${index + 1}")
          }
          headerList += dynamicTable[dynamicTableIndex]!!
        }
      }

      // referencedHeaders is relative to nextHeaderIndex + 1.