core/file.rbs in rbs-1.4.0 vs core/file.rbs in rbs-1.5.0

@@ -1040,20 +1040,22 @@
 
   def rdev_major: () -> Integer
 
   def rdev_minor: () -> Integer
 
-  def read: (?Integer length, ?String outbuf) -> String
+  def read: (?int? length, ?string outbuf) -> String?
 
   def readable?: () -> bool
 
   def readable_real?: () -> bool
 
   def setgid?: () -> bool
 
   def setuid?: () -> bool
 
   def size: () -> Integer
+
+  def size?: () -> Integer?
 
   def socket?: () -> bool
 
   def sticky?: () -> bool