Function addElementToArrayLiteral

packages/language-service/src/utils/ts_utils.ts:194–199

(
  arr: ts.ArrayLiteralExpression,
  elem: ts.Expression,
)

 * Given an existing array literal expression, update it by pushing a new expression.
 */
export function addElementToArrayLiteral(
  arr: ts.ArrayLiteralExpression,
  elem: ts.Expression,
): ts.ArrayLiteralExpression {
  return ts.factory.updateArrayLiteralExpression(arr, [...arr.elements, elem]);
}

/**
 * Given an ObjectLiteralExpression node, extract and return the PropertyAssignment corresponding to