code: public FaunusPipeline as(final String name) {
          this.state.assertNotLocked();
          this.state.assertNoProperty();
  
          this.state.addStep(name);
  
          final String string = "As(" + name + "," + this.stringRepresentation.get(this.state.getStep(name)) + ")";
          this.stringRepresentation.set(this.state.getStep(name), string);
          return this;
      }
docs: Name a step in order to reference it later in the expression.
  
  @param name the string representation of the name
  @return the extended FaunusPipeline