The ornamental design of a strapretainer for a carried bag, as shown and described.
FIG. 1 is a perspective view of the present invention;
FIG. 2 is a top view of the present invention;
FIG. 3 is a bottom view of the present invention;
FIG. 4 is a left side view of the present invention;
FIG. 5 is a front view of the present invention; and,
FIG. 6 is a back view of the present invention.
The right side view is a mirror of the left side view shown in FIG. 4. The dashed area in FIGS. 1 and 2 where ornamentation may be added is not part of the claimed design.
The broken lines showing an opening are for illustrative purposes only and form no part of the claimed design.