public Builder alias(String alias) {
            this.alias = alias;
            return this;
        }
Adds an alias to the SymbolReference.

<p>An alias is used in some programming languages to change the
way a symbol is referenced in a source file. Aliases are often used
for de-conflicting symbols.

@param alias Alias to assign the symbol.
@return Returns the builder.
smithy-codegen-core/src/main/java/software/amazon/smithy/codegen/core/SymbolReference.java