parameters: (self, x)
docstring: Prepend an `int64` to the Builder buffer.
  
          Note: aligns and checks for space.
docstring_summary: Prepend an `int64` to the Builder buffer.
docstring_tokens: Prepend an int64 to the Builder buffer .
function: def PrependInt64(self, x):
          """Prepend an `int64` to the Builder buffer.
  
          Note: aligns and checks for space.
          """
          self.Prepend(N.Int64Flags, x)
function_tokens: def PrependInt64 ( self , x ) : self . Prepend ( N . Int64Flags , x )