[b]Note:[/b] For a [RichTextEffect] to be usable, a BBCode tag must be defined as a member variable called [code]bbcode[/code] in the script.
[codeblock]
# The RichTextEffect will be usable like this: `[example]Some text[/example]`
var bbcode = "example"
[/codeblock]
[b]Note:[/b] As soon as a [RichTextLabel] contains at least one [RichTextEffect], it will continuously process the effect unless the project is paused. This may impact battery life negatively.
Override this method to modify properties in [code]char_fx[/code]. The method must return [code]true[/code] if the character could be transformed successfully. If the method returns [code]false[/code], it will skip transformation to avoid displaying broken text.