SBExpressionPropertyDescriptor whose type is "non-simple" (e.g., a
list or tuple type). The annotation takes a single value which is the string
representation of the type--e.g., "list(double)" or
"(symbol string, price double, quantity double)". (Note that the syntax for a
"tuple" types is a parenthesized, comma-separated list of field name/type
pairs.)public abstract String value