Function grpc_timeout 

pub fn grpc_timeout(val: &str) -> Option<Duration>

Parses the grpc-timeout header value into a Duration.

The format is a positive integer followed by a unit suffix:

• H: Hours
• M: Minutes
• S: Seconds
• m: Milliseconds
• u: Microseconds
• n: Nanoseconds

Parameters

• val: The header value string.

Returns

An Option<Duration> if parsing is successful, otherwise None.