docs: protected void generateIFormalParameterBuilder() {
  		final TypeReference builder = getFormalParameterBuilderInterface();
  		final StringConcatenationClient content = new StringConcatenationClient() {
  			@Override
  			protected void appendTo(TargetStringConcatenation it) {
  				it.append("/** Builder of a " + getLanguageName() //$NON-NLS-1$
  						+ " formal parameter."); //$NON-NLS-1$
  				it.newLine();
  				it.append(" */"); //$NON-NLS-1$
  				it.newLine();
  				it.append("@SuppressWarnings(\"all\")"); //$NON-NLS-1$
  				it.newLine();
  				it.append("public interface "); //$NON-NLS-1$
  				it.append(builder.getSimpleName());
  				it.append(" {"); //$NON-NLS-1$
  				it.newLineIfNotEmpty();
  				it.newLine();
  				it.append(generateMembers(true, false));
  				it.append("}"); //$NON-NLS-1$
  				it.newLineIfNotEmpty();
  				it.newLine();
  			}
  		};
  		final JavaFileAccess javaFile = getFileAccessFactory().createJavaFile(builder, content);
  		javaFile.writeTo(getSrcGen());
  	}