     self.define(Procedure("string-ci>?", stringCiGreaterThan))
     self.define(Procedure("string-ci>=?", stringCiGreaterThanEquals))
     self.define(Procedure("string-contains?", stringContains))
+    self.define(Procedure("string-prefix?", stringPrefix))
+    self.define(Procedure("string-suffix?", stringSuffix))
     self.define(Procedure("string-upcase", stringUpcase))
     self.define(Procedure("string-downcase", stringDowncase))
     self.define(Procedure("string-titlecase", stringTitlecase))

    }
    return .void
  }
}

    self.define(Procedure("string-copy", stringCopy))
    self.define(Procedure("string-copy!", stringInsert))
    self.define(Procedure("string-fill!", stringFill))
    self.define(Procedure("string-split", stringSplit))
    self.define(Procedure("string-trim", stringTrim))
    self.define(Procedure("_string-list-ref", stringListRef))
    self.define(Procedure("_string-list-length", stringListLength))
    self.define("string-map", via:
