Method setter

protoc-gen-go/generator/generator.go:1946–1946

print getter

(g *Generator, mc *msgCtx)

	decl(g *Generator, mc *msgCtx)   // print declaration within the struct
	getter(g *Generator, mc *msgCtx) // print getter
	setter(g *Generator, mc *msgCtx) // print setter if applicable
}

// defField interface implemented by all types of fields that can have defaults (not oneofField, but instead oneofSubField).