     // Remove event listeners from handle0     this.handle0.removeEventListener("keydown", this.handle0Keydown, false);     this.handle0.removeEventListener("focus", this.showTooltip, false);     this.handle0.removeEventListener("blur", this.hideTooltip, false);      // Remove event listeners from handle0     this.handle0.removeEventListener("keydown", this.handle0Keydown, false);     this.handle0.removeEventListener("focus", this.handle0Keydown, false);     this.handle0.removeEventListener("blur", this.h