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.
const bold = SpreadsheetApp.newTextStyle().setBold(true).build();
const italic = SpreadsheetApp.newTextStyle().setItalic(true).build();
const 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.
const bold = SpreadsheetApp.newTextStyle().setBold(true).build();
const italic = SpreadsheetApp.newTextStyle().setItalic(true).build();
const value = SpreadsheetApp.newRichTextValue()
                  .setText('HelloWorld')
                  .setTextStyle(0, 5, bold)
                  .setTextStyle(italic)
                  .build();