public Builder addMember(String memberName, int enumValue) {
            return addMember(memberName, enumValue, null);
        }
Adds a member to the builder.

@param memberName Member name to add.
@param enumValue The value of the enum.
@return Returns the builder.
smithy-model/src/main/java/software/amazon/smithy/model/shapes/IntEnumShape.java