How to download and setup tessera
Open terminal and run command
                                            git clone https://github.com/tessera-metrics/tessera.git
                                        
                                        git clone is used to create a copy or clone of tessera 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 tessera https://github.com/tessera-metrics/tessera/archive/master.zip
Or simply clone tessera with SSH
                                            [email protected]:tessera-metrics/tessera.git                                    
                                    If you have some problems with tessera
You may open issue on tessera support forum (system) here: https://github.com/tessera-metrics/tessera/issuesSimilar to tessera repositories
Here you may see tessera alternatives and analogs
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