Question: Who directed a sequel film with a character for which a JavaScript debugger is named?
Context: Walter is a Muppet character that first appeared in the 2011 film, "The Muppets".  Performed by Peter Linz, he is one of the central protagonists introduced in the film, and one of the film's main characters, along with Kermit the Frog and the rest of the Muppets.  Walter also appears in the 2014 sequel film, "Muppets Most Wanted"; though still a major character, he plays a smaller role than he does in the previous film. Zutto Mae Kara Suki Deshita: Kokuhaku Jikkō Iinkai (ずっと前から好きでした。～告白実行委員会～ ) , also known by its English title I've Always Liked You, is a 2016 Japanese animated youth romance film directed by Tetsuya Yanagisawa, written by , and produced by Qualia Animation.  The film is based on the "Kokuhaku Jikkō Iinkai ~Ren'ai Series~" Vocaloid song project by HoneyWorks.  It was released in Japan by Aniplex on April 23, 2016.  The movie is currently streaming on Crunchyroll.  A sequel film was released on December 17, 2016 in Japan. Lila Loomis (née Crane) is a fictional character created by Robert Bloch in his 1959 novel "Psycho", and portrayed by Vera Miles in the 1960 film of the same name directed by Alfred Hitchcock.  She is also portrayed by Julianne Moore in the 1998 remake.  She is the sister of slain victim Marion Crane.  Additionally, Lila appears in Bloch's 1982 sequel novel "Psycho II", and the unrelated 1983 sequel film of the same name, in which she serves as an antagonist. Ran Kevita, (Sinhalese: "රන් කෙවිට" ) is a 2007 Sri Lankan Sinhala children's fantasy film directed by Udayakantha Warnasuriya and co-produced by Pravin Jayarathne, Dilman Jayaratne, Janith Marasinghe and Udayakantha Warnasuriya for Millenium Entertainments.  Its sequel film "Ran Kevita 2" directed by the same director released in 2013.  It stars Hisham Samsudeen in lead role along with Vijaya Nandasiri and Srinath Maddumage.  Music composed by Sangeeth Wickramasinghe.  It is the 1084th Sri Lankan film in the Sinhala cinema. Ghostbusters II is a 1989 American supernatural comedy film directed and produced by Ivan Reitman, written by Dan Aykroyd and Harold Ramis and starring Bill Murray, Aykroyd, Sigourney Weaver, Ramis, Ernie Hudson and Rick Moranis.  It is the sequel to the 1984 film "Ghostbusters", and follows the further adventures of the three parapsychologists and their organization which combats paranormal activities. K3 en het Ijsprinsessje (aka: K3 and the Little Ice Princess) is a 2006 Flemish pre-teen adventure film written by Hans Bourlon and Gert Verhulst, directed by Indra Siera, and starring the women of the K3 girlband in a sequel to their 2004 blockbuster film "K3 en het Magisch Medaillon".  The sequel film was aired on Zappelin, SBS 6, Ketnet, Kindernet and RTL Telekids. Venkman is the JavaScript debugger component of the Mozilla Application Suite.  It is also available as a Mozilla Firefox extension.  Venkman is named after the character Dr. Peter Venkman, played by Bill Murray in the movies "Ghostbusters" and "Ghostbusters II". Knock Out is a fictional character from the computer-animated series, "".  The character was initially introduced as a medic of the Decepticons and responsible for taking care of Megatron while he was in a coma.  After Megatron regained consciousness, he continued serving him.  Despite his status as a medic, Knock Out would often participate in field missions with his partner Breakdown.  Following Breakdown's death during the second season, Knock Out would often be partnered for the rest of the series with Starscream and Shockwave, to help them with their scientific experiments against the Autobots.  In the series finale, after the Decepticons are defeated, Knock Out attempts to join the Autobots; a goal that he achieves in the sequel film, "". Tanda Putera (English: "The Mark of a Prince") is a 2013 Malaysian history film directed by Shuhaimi Baba.  The film chronicles the relationship between Tun Abdul Razak, who was the second Malaysian Prime Minister, and his then deputy Tun Dr Ismail set around the time after the 1969 racial riots.  The film was intended to be released in Malaysian cinemas on 13 September 2012 but the release was delayed until 29 August 2013 due to some controversy regarding the portrayal of the racial riots being the plot point of the film.  It is Shuhaimi Baba's sequel film to "" in 2007. Slime City Massacre is a 2010 science fiction comedy-horror sequel film directed by Greg Lamberson and starring Jennifer Bihl, Kealan Patrick Burke, Debbie Rochon and Robert Sabin.  It is a sequel to Greg Lamberson's earlier "Slime City".
Answer: Ivan Reitman