Function appendErrorBlock

appendErrorBlock(program: Program, error: ErrorBlockInput): Program
Appends a structured error to a program.
Parameters
- program: Program
  Program to edit.
- error: ErrorBlockInput
  Error to record. Undefined fields are omitted from the program.
Returns Program
A new program; the input is left untouched.
Example
```
const failed = appendErrorBlock(createProgram(), {
  source: "provider",
  status: 429,
  message: "rate limited",
});
```