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据我所知，jqgrid 不支持使用树视图进行分页。怎么分组。jqgrid 是否支持具有分组功能的分页？
我已经rspec2安装了spork，guard当运行guard命令时，我得到这个错误：
rspec2
spork
guard
undefined method `generators' for #<RSpec::Core::Configuration:0x007fb39