# Functions
GetHeader Retrieves a HTTP header key, if available.
GetHeaderFromContext retrieves the HTTP header from the context's gRPC metadata.
GetHeaders Retrieves all HTTP header keys as a map.
NewClient initialises a GRPC client.
NewServer initialises a gRPC server.
# Structs
Client wraps up *grpc.ClientConn.
ClientConfig indicates how a GRPC client should be initialised.
Server wraps up *grpc.Server.
ServerConfig indicates how a gRPC server should be initialised.