This is a built-in template used for filling the body of a Kotlin method each time it is generated by the program, e.g. when using the Create Method from Usage intention action. The template is editable. Along with Kotlin expressions and comments, you can also use the predefined variables that will be then expanded into the corresponding values.

Predefined variables will take the following values:
${RETURN_TYPE}		a return type of a created method
${METHOD_NAME}		name of the created method
${CLASS_NAME}		qualified name of the class where method is created
${SIMPLE_CLASS_NAME}		non-qualified name of the class where method is implemented