code: protected BaseMethodBinding<?> getBinding(final RestOperationTypeEnum restOperation, final String theBindingKey) {
          return getBindings().getBinding(restOperation, theBindingKey);
      }
docs: Return the method binding for the given rest operation
  
  @param restOperation the rest operation to retrieve
  @param theBindingKey the key determining the method to be executed (needed for e.g. custom operation)
  @return