var X = {
  perform: function<    
     A, B, C, D, E, F, G,     
     T: (a: A, b: B, c: C, d: D, e: E, f: F) => G // eslint-disable-line space-before-function-paren
   >(     
     method: T, scope: any,     
     a: A, b: B, c: C, d: D, e: E, f: F,    
   ): G {
  }
}