function getCorrectColumn(tokens, expectedLocation) {
      switch (expectedLocation) {
        case 'props-aligned':
          return tokens.lastProp.column;
        case 'tag-aligned':
          return tokens.opening.column;
        case 'line-aligned':
          return tokens.openingStartOfLine.column;
        default:
          return null;
      }
    }
Get the correct 0-indexed column for the closing bracket, given the
expected location.
@param {Object} tokens Locations of the opening bracket, closing bracket and last prop
@param {string} expectedLocation Expected location for the closing bracket
@return {?Number} The correct column for the closing bracket, or null