$mappingFields = [
  [
    // contact_id
    'name' => 'Contact ID',
  ],
  [
    // first_name
    'name' => 'First Name',
    'column_number' => 1,
  ],
  [
    // last_name
    'name' => 'Last Name',
    'column_number' => 2,
  ],
  [
    // nick_name
    'name' => 'Nick Name',
    'column_number' => 3,
  ],
  [
    // street_address
    'name' => 'Street Address',
    'column_number' => 4,
    'location_type_id' => 'Old 2019',
  ],
  [
    // supplemental_address_1
    'name' => 'Supplemental Address 1',
    'column_number' => 5,
    'location_type_id' => 'Old 2019',
  ],
  [
    // supplemental_address_1
    'name' => 'Supplemental Address 2',
    'column_number' => 6,
    'location_type_id' => 'Old 2019',
  ],
  [
    // city
    'name' => 'City',
    'column_number' => 7,
    'location_type_id' => 'Old 2019',
  ],
  [
    // state_province
    'name' => 'State',
    'column_number' => 8,
    'location_type_id' => 'Old 2019',
  ],
  [
    // postal code
    'name' => 'Postal Code',
    'column_number' => 9,
    'location_type_id' => 'Old 2019',
  ],
  [
    // country
    'name' => 'Country',
    'column_number' => 10,
    'location_type_id' => 'Old 2019',
  ],
  [
    // voterbase_id
    'name' => '- do not import -',
    'column_number' => 11,
  ],
  [
    // tsmart_sample_id
    'name' => '- do not import -',
    'column_number' => 12,
  ],
  [
    // tsmart_full_address
    'name' => '- do not import -',
    'column_number' => 13,
  ],
  [
    // tsmart_city
    'name' => 'City',
    'column_number' => 14,
  ],
  [
    // tsmart_state
    'name' => 'State',
    'column_number' => 15,
  ],
  [
    // tsmart_zip
    'name' => 'Postal Code',
    'column_number' => 16,
  ],
  [
    // tsmart_zip4
    'name' => 'Postal Code Suffix',
    'column_number' => 17,
  ],
  [
    //tb.new_mover_flg
    'name' => '- do not import -',
    'column_number' => 18,
  ],
  [
    // voterbase_dob
    'name' => 'Birth Date',
    'column_number' => 19,
  ],
  [
    // deceased_flag_date_of_death
    'name' => 'Deceased Date',
    'contact_type' => 'Individual',
    'column_number' => 20,
  ],
  [
    // Household Income Range
    'name' => 'Income Range :: Prospect',
    'column_number' => 21,
  ],
  [
    // Household Income Range_key
    'name' => '- do not import -',
    'column_number' => 22,
  ],
  [
    // Household Net Worth
    'name' => 'Estimated Net Worth :: Prospect',
    'column_number' => 23,
  ],
  [
    // Household Net Worth Key
    'name' => '- do not import -',
    'column_number' => 24,
  ],
  [
    //xpg.donor_contributes_to_charities
    'name' => '- do not import -',
    'column_number' => 25,
  ],
  [
    // tb.charitable_contrib_decile
    'name' => 'Charitable Contributions Decile :: Prospect',
    'column_number' => 26,
  ],
  [
    // Discretionary Income Amount
    'name' => '- do not import -',
    'column_number' => 27,
  ],
  [
    // Discretionary Income Decile
    'name' => 'Disc Contributions Decile :: Prospect',
    'column_number' => 28,
  ],
  [
    // Family Composition Code - use next field.
    'name' => '- do not import -',
    'column_number' => 29,
  ],
  [
    // Family Composition.
    'name' => 'Family Composition :: Prospect',
    'column_number' => 30,
  ],
  [
    // vf_party.
    'name' => 'Voter Party :: Prospect',
    'column_number' => 31,
  ],
  [
    //party_score_rollup. (how does this related to vf_party?)
    'name' => '- do not import -',
    'column_number' => 32,
  ],
  [
    // Occupation.
    'name' => 'Occupation :: Prospect',
    'column_number' => 33,
  ],
  [
    // Occupation_key - assume same data as ^^ in diff format
    'name' => '- do not import -',
    'column_number' => 34,
  ],
  [
    // voterbase_gender.
    'name' => 'Gender',
    'column_number' => 35,
  ],
];

1 => '$20 Million +',
2 => '$10 Million - $19.99 Million',
3 => '$5 Million - $9.99 Million',
4 => '$2 Million - $4.99 Million',
5 => '$1 Million - $1.99 Million',
6 => '$500,000 - $999,999',