*/ private array $props = []; public static function make(): self { return new self(); } public function set_breakpoint( string $breakpoint ): self { $this->breakpoint = $breakpoint; return $this; } public function set_state( string $state ): self { $this->state = $state; return $this; } public function add_prop( string $key, $value ): self { $this->props[ $key ] = $value; return $this; } public function add_props( array $props ): self { $this->props = array_merge( $this->props, $props ); return $this; } public function build(): array { return [ 'meta' => [ 'breakpoint' => $this->breakpoint, 'state' => $this->state, ], 'props' => $this->props, ]; } }