returns true if the multiplicity is 0,1 or 1,1 . concode_field_sep BigInteger min concode_elem_sep Multiplicity STAR concode_elem_sep BigInteger max concode_elem_sep Multiplicity ONE concode_elem_sep Multiplicity OPTIONAL concode_elem_sep Multiplicity PLUS concode_elem_sep Multiplicity ZERO concode_field_sep Multiplicity oneOrMore concode_elem_sep Multiplicity makeRepeated concode_elem_sep boolean isUnique concode_elem_sep boolean includes concode_elem_sep boolean isOptional concode_elem_sep Multiplicity makeOptional concode_elem_sep int hashCode concode_elem_sep boolean equals concode_elem_sep String getMaxString concode_elem_sep Multiplicity create concode_elem_sep Multiplicity create concode_elem_sep boolean isZero concode_elem_sep boolean isZero concode_elem_sep String toString concode_elem_sep Multiplicity choice concode_elem_sep Multiplicity multiply concode_elem_sep Multiplicity group
boolean function ( ) { if ( max == null ) return false ; return max . compareTo ( BigInteger . ONE ) <= 0 ; }