|  | @@ 52-58 (lines=7) @@ | 
                                                            
                                    | 49 |  | 		return $this->addElementInContent("content", $image); | 
                                                            
                                    | 50 |  | 	} | 
                                                            
                                    | 51 |  |  | 
                                                            
                                    | 52 |  | 	public function addReveal($visibleContent, $hiddenContent=NULL, $type=RevealType::FADE, $attributeType=NULL) { | 
                                                            
                                    | 53 |  | 		$reveal=$visibleContent; | 
                                                            
                                    | 54 |  | 		if (!$visibleContent instanceof HtmlReveal) { | 
                                                            
                                    | 55 |  | 			$reveal=new HtmlReveal("reveral-" . $this->identifier, $visibleContent, $hiddenContent, $type, $attributeType); | 
                                                            
                                    | 56 |  | 		} | 
                                                            
                                    | 57 |  | 		return $this->addElementInContent("content", $reveal); | 
                                                            
                                    | 58 |  | 	} | 
                                                            
                                    | 59 |  |  | 
                                                            
                                    | 60 |  | 	public function addRevealImage($visibleContent, $hiddenContent=NULL, $type=RevealType::FADE, $attributeType=NULL) { | 
                                                            
                                    | 61 |  | 		$reveal=$visibleContent; | 
                                                                                
                                |  | @@ 60-66 (lines=7) @@ | 
                                                            
                                    | 57 |  | 		return $this->addElementInContent("content", $reveal); | 
                                                            
                                    | 58 |  | 	} | 
                                                            
                                    | 59 |  |  | 
                                                            
                                    | 60 |  | 	public function addRevealImage($visibleContent, $hiddenContent=NULL, $type=RevealType::FADE, $attributeType=NULL) { | 
                                                            
                                    | 61 |  | 		$reveal=$visibleContent; | 
                                                            
                                    | 62 |  | 		if (!$visibleContent instanceof HtmlReveal) { | 
                                                            
                                    | 63 |  | 			return $this->addReveal(new HtmlImage("", $visibleContent), new HtmlImage("", $hiddenContent), $type, $attributeType); | 
                                                            
                                    | 64 |  | 		} | 
                                                            
                                    | 65 |  | 		return $this->addElementInContent("content", $reveal); | 
                                                            
                                    | 66 |  | 	} | 
                                                            
                                    | 67 |  |  | 
                                                            
                                    | 68 |  | 	public function addExtraContent($content) { | 
                                                            
                                    | 69 |  | 		return $this->addElementInContent("extra-content", $this->createContent($content, "extra content")); |