Gets the body or throws an error if it doesn't exist.
Optionalmessage: string | (() => string)Gets the body text without leading whitespace, leading indentation, or trailing whitespace. Returns undefined if there is no body.
Gets if the node has a body.
Removes the body if it exists.
Sets the body text. A body is required to do this operation.
Text or writer function to set as the body.
Adds a body if it doesn't exists.