syntax="proto3";
package graph.services;

message BeforeRequest {}
message BeforeResponse {
    int32 foo = 99; // comment
}

service Empty {}

// unary only methods
service Unary {
    // message come before
    rpc UnaryBefore(BeforeRequest) returns (BeforeResponse);

    // messages come after
    rpc UnaryAfter(AfterRequest) returns (AfterResponse);
}

service Streaming {
    rpc ClientStream(stream BeforeRequest) returns (BeforeResponse);
    rpc ServerStream(AfterRequest) returns (stream AfterResponse);
    rpc BiDiStream(stream BeforeRequest) returns (stream AfterResponse);
}

message AfterRequest {}
message AfterResponse {}