asset
                                Manages URL generation and versioning of web assets such as CSS stylesheets, JavaScript files and image files
                            
                        How to download and setup asset
Open terminal and run command
                                            git clone https://github.com/symfony/asset.git
                                        
                                        git clone is used to create a copy or clone of asset 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 asset https://github.com/symfony/asset/archive/master.zip
Or simply clone asset with SSH
                                            [email protected]:symfony/asset.git                                    
                                    If you have some problems with asset
You may open issue on asset support forum (system) here: https://github.com/symfony/asset/issuesSimilar to asset repositories
Here you may see asset alternatives and analogs
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