code: private static @CheckForNull
      TypeQualifierAnnotation findMatchingTypeQualifierAnnotation(Collection<TypeQualifierAnnotation> typeQualifierAnnotations,
              TypeQualifierValue<?> typeQualifierValue) {
          for (TypeQualifierAnnotation typeQualifierAnnotation : typeQualifierAnnotations) {
              if (typeQualifierAnnotation.typeQualifier.equals(typeQualifierValue)) {
                  return typeQualifierAnnotation;
              }
          }
          return null;
      }
docs: Look up a TypeQualifierAnnotation matching given TypeQualifierValue.
  
  @param typeQualifierAnnotations
  a Collection of TypeQualifierAnnotations
  @param typeQualifierValue
  a TypeQualifierValue
  @return matching TypeQualifierAnnotation, or null if none