question: gets tracking id . concode_field_sep String createdDate concode_elem_sep String itemBarcode concode_elem_sep String patronBarcode concode_elem_sep Description description concode_elem_sep Integer id concode_elem_sep Object updatedDate concode_elem_sep String owningInstitutionId concode_elem_sep String trackingId concode_field_sep void setPatronBarcode concode_elem_sep void setOwningInstitutionId concode_elem_sep void setTrackingId concode_elem_sep String getPatronBarcode concode_elem_sep Integer getId concode_elem_sep String getOwningInstitutionId concode_elem_sep Object getUpdatedDate concode_elem_sep void setDescription concode_elem_sep void setItemBarcode concode_elem_sep Description getDescription concode_elem_sep void setCreatedDate concode_elem_sep String getItemBarcode concode_elem_sep void setId concode_elem_sep void setUpdatedDate concode_elem_sep String getCreatedDate
target: String function ( ) { return trackingId ; }