def include?(item)
      chunk_item = if item.is_a?(Integer)
                     item.chr
                   elsif item.is_a?(String)
                     data = Encoding::ASCII_8BIT == item.encoding ? item : item.htb
                     Bitcoin::Script.pack_pushdata(data)
                   end
      return false unless chunk_item
      chunks.include?(chunk_item)
    end
def include?(item)
      chunk_item = if item.is_a?(Integer)
                     item.chr
                   elsif item.is_a?(String)
                     data = Encoding::ASCII_8BIT == item.encoding ? item : item.htb
                     Bitcoin::Script.pack_pushdata(data)
                   end
      return false unless chunk_item
      chunks.include?(chunk_item)
    end
Check the item is in the chunk of the script.