const google.golang.org/protobuf/internal/encoding/messageset.FieldTypeID
4 uses
google.golang.org/protobuf/internal/encoding/messageset (current package)
messageset.go#L29: FieldTypeID = protowire.Number(2)
messageset.go#L67: return 2*protowire.SizeTag(FieldItem) + protowire.SizeTag(FieldTypeID) + protowire.SizeVarint(uint64(num))
messageset.go#L129: case num == FieldTypeID && wtyp == protowire.VarintType:
messageset.go#L186: b = protowire.AppendTag(b, FieldTypeID, protowire.VarintType)
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