Class RichTextValueBuilder

// Creates a Rich Text value for the text "foo no baz" with "foo" pointing to
// "https://bar.foo" and "baz" to "https://abc.xyz".
// "foo" is underlined with the default link color, whereas "baz" has its text style
// overridden by a call to `setTextStyle`, and is therefore black and bold with no underlining.
const boldStyle = SpreadsheetApp.newTextStyle()
    .setUnderline(false)
    .setBold(true)
    .setForegroundColor("#000000")
    .build();
const value = SpreadsheetApp.newRichTextValue()
    .setText("foo no baz")
    .setLinkUrl(0, 3, "https://bar.foo")
    .setLinkUrl(7, 10, "https://abc.xyz")
    .setTextStyle(7, 10, boldStyle)
    .build();

// Creates a Rich Text value for the text "Foo" which points to "https://bar.foo".
const value = SpreadsheetApp.newRichTextValue()
    .setText("Foo")
    .setLinkUrl("https://bar.foo")
    .build();

// Creates a Rich Text value for the text "HelloWorld", with "Hello" bolded, and "World"
// italicized.
var bold = SpreadsheetApp.newTextStyle().setBold(true).build();
var italic = SpreadsheetApp.newTextStyle().setItalic(true).build();
var value = SpreadsheetApp.newRichTextValue()
    .setText("HelloWorld")
    .setTextStyle(0, 5, bold)
    .setTextStyle(5, 10, italic)
    .build();

// Creates a Rich Text value for the text "HelloWorld" with "Hello" bolded and italicized,
// and "World" only italicized.
var bold = SpreadsheetApp.newTextStyle().setBold(true).build();
var italic = SpreadsheetApp.newTextStyle().setItalic(true).build();
var value = SpreadsheetApp.newRichTextValue()
    .setText("HelloWorld")
    .setTextStyle(0, 5, bold)
    .setTextStyle(italic)
    .build();