Definition:


{ &hf_mongo_msg_sections_section_doc_sequence_id,
    { *"SeqID",* "mongo.msg.sections.section.doc_sequence_id",
    *FT_STRING,* BASE_NONE, NULL, 0x0,
    *"Document sequence identifier",* HFILL }
},

Add to tree:


proto_tree_add_item(
    section_tree,
    *hf_mongo_msg_sections_section_doc_sequence_id,*
    tvb, offset, dsi_length,
    *ENC_ASCII|ENC_NA*
);