getBlockNames()
                
                getBlockNames(array  $context = array()) : array<mixed,string>
                Returns defined block names in the template.
                
                                    Parameters
                    
                                                    
                                | array | 
                                $context  | 
                                An array of parameters to pass to the template  | 
                            
                                            
                
                
                                    Returns
                    array<mixed,string>
                                            — An array of defined template block names