How to download and setup expandable-recycler-view
Open terminal and run command
                                            git clone https://github.com/bignerdranch/expandable-recycler-view.git
                                        
                                        git clone is used to create a copy or clone of expandable-recycler-view repositories.
                                        You pass git clone a repository URL. it supports a few different network protocols and corresponding URL formats.
Also you may download zip file with expandable-recycler-view https://github.com/bignerdranch/expandable-recycler-view/archive/master.zip
Or simply clone expandable-recycler-view with SSH
                                            [email protected]:bignerdranch/expandable-recycler-view.git                                    
                                    If you have some problems with expandable-recycler-view
You may open issue on expandable-recycler-view support forum (system) here: https://github.com/bignerdranch/expandable-recycler-view/issuesSimilar to expandable-recycler-view repositories
Here you may see expandable-recycler-view alternatives and analogs
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