public Builder addProjectionResult(ProjectionResult result) {
            results.add(result);
            return this;
        }
Adds a projection result to the builder.

<p>This method is thread-safe as a synchronized list is updated each
time this is called.

@param result Result to add.
@return Returns the builder.
smithy-build/src/main/java/software/amazon/smithy/build/SmithyBuildResult.java