void function ( Double arg0 ) { this . opacity = arg0 ; }
sets the value of the opacity property . concode_field_sep Double quantity concode_elem_sep String color concode_elem_sep String label concode_elem_sep Double opacity concode_field_sep Double getOpacity concode_elem_sep void setColor concode_elem_sep Double getQuantity concode_elem_sep String getLabel concode_elem_sep void setQuantity concode_elem_sep String getColor concode_elem_sep void setLabel