A built-in template for PHP setter methods used, for example, when "Add getter and setter" quick fix is invoked.
Predefined variables will take the following values:
${STATIC}   If the field is static takes the value of "static" or empty string otherwise.
${NAME}   Method name in camel caps style without "set" prefix with the first character capitalized. For example, field name "_my_field" is converted to "MyField".
${CLASS_NAME}   The name of containing class.
${SCALAR_TYPE_HINT}   Contains scalar type hint if language level is PHP 7.0 or higher
${FIELD_NAME}   The original field name as is.
${PARAM_NAME}   Parameter name for setter. Almost the same as ${FIELD_NAME} but with the first underscore (if any) removed. For example, field name "_myField" will be converted to "myField".
${TYPE_HINT}   The type hint of the field or empty string if not specified.
${VOID_RETURN_TYPE}   Indicates if void return type is available for PHP Language Level in project
${DS}   Dollar sign, evaluates to a plain '$' character.