Any one help me on this error appybuilder code editor

[Taifun]

here is your error

public String StoreData(String ) {

correct would be something like this

public String StoreData(String someValue) {

also please follow the naming conventions… please no underscores!
Spreadsheet_Extension/Spreadsheet_Extension.java

Naming conventions for extension developers

If you are developing an extension, then please follow the naming conventions, which is UpperCamelCase for the package name as well as for property, method and event names (i.e. the first letter should be a capital letter) and lowerCamelCase for parameter names, no underscores . Example [naming] What does UpperCamelCase mean? UpperCamelCase (part of CamelCase ) is a naming convention in which a name is formed of multiple words that are joined together as a single word with the first l…

Taifun