code: void addWrites(MethodDescriptor methodDescriptor, final Integer lineNumber, FieldDescriptor fieldDescriptor) {
          WritesDescriptor writesDescriptor = scannerContext.getStore().create(methodDescriptor, WritesDescriptor.class, fieldDescriptor);
          writesDescriptor.setLineNumber(lineNumber);
      }
docs: Add a writes relation between a method and a field.
  
  @param methodDescriptor
  The method.
  @param lineNumber
  The line number.
  @param fieldDescriptor
  The field.