--- /dev/null
+import enum
+import sys
+
+LOG_THRESHOLD_FOR_CONNLOST_WRITES: int
+ACCEPT_RETRY_DELAY: int
+DEBUG_STACK_DEPTH: int
+if sys.version_info >= (3, 7):
+ SSL_HANDSHAKE_TIMEOUT: float
+ SENDFILE_FALLBACK_READBUFFER_SIZE: int
+
+class _SendfileMode(enum.Enum):
+ UNSUPPORTED: int
+ TRY_NATIVE: int
+ FALLBACK: int