+Wire type mapping is as follows:
+
+========================= ============
+LTYPEs Wire type
+========================= ============
+VARINT, SVARINT PB_WT_VARINT
+FIXED with data_size == 8 PB_WT_64BIT
+STRING, BYTES, SUBMESSAGE PB_WT_STRING
+FIXED with data_size == 4 PB_WT_32BIT
+========================= ============
+