public Builder addError(String errorShapeId) {
            return addError(ShapeId.from(errorShapeId));
        }
Adds an error to the operation.

@param errorShapeId Error shape ID to add.
@return Returns the builder.
@throws ShapeIdSyntaxException if the shape ID is invalid.
smithy-model/src/main/java/software/amazon/smithy/model/shapes/OperationShape.java