1*c8d645caSAndroid Build Coastguard Workersyntax = "proto2"; 2*c8d645caSAndroid Build Coastguard Worker 3*c8d645caSAndroid Build Coastguard Workermessage Message1 4*c8d645caSAndroid Build Coastguard Worker{ 5*c8d645caSAndroid Build Coastguard Worker optional uint32 fieldA = 1; 6*c8d645caSAndroid Build Coastguard Worker extensions 30 to max; 7*c8d645caSAndroid Build Coastguard Worker} 8*c8d645caSAndroid Build Coastguard Worker 9*c8d645caSAndroid Build Coastguard Workermessage Message2 10*c8d645caSAndroid Build Coastguard Worker{ 11*c8d645caSAndroid Build Coastguard Worker extend Message1 12*c8d645caSAndroid Build Coastguard Worker { 13*c8d645caSAndroid Build Coastguard Worker optional Message2 extras = 30; 14*c8d645caSAndroid Build Coastguard Worker } 15*c8d645caSAndroid Build Coastguard Worker 16*c8d645caSAndroid Build Coastguard Worker optional uint32 field1 = 1; 17*c8d645caSAndroid Build Coastguard Worker optional uint32 field2 = 2; 18*c8d645caSAndroid Build Coastguard Worker} 19