code: function (erc20Address, owner) {
      const BrandedTokenKlass = require(rootPrefix + '/lib/contract_interact/branded_token')
        , brandedToken = new BrandedTokenKlass({ERC20: erc20Address})
      ;
  
      return brandedToken.getBalanceOf(owner);
    }
docs: Get Branded Token Balance of an address
  
  @param {string} erc20Address - address of erc20 contract address
  @param {string} owner - address
  
  @return {promise<result>}