code: public AT_Context setFrameLeftRightChar(Character frameLeft, Character frameRight){
  		if(frameLeft!=null && frameRight!=null){
  			this.frameLeftChar = frameLeft;
  			this.frameRightChar = frameRight;
  		}
  		return this;
  	}
docs: Sets the left and right frame margin character.
  @param frameLeft character
  @param frameRight character
  @return this to allow chaining