Find Method Parameters

:::info[Note] This is a point-in-time snapshot of the API documentation from January 2026. Going forward, we will not be maintaining a public copy of these references, and recommend users to refer to the built-in signature helpers available in the Hack LSP instead for complete and up-to-date information. :::

Instead of doing a full recursion like the lambda extractor, this function can do a shallow search of the tree to collect methods by name

namespace HH\ExperimentalParserUtils;

function find_method_parameters(
  \HH\ParseTree $json,
  string $method_name,
  int $line_number,
): MethodParametersNode;

If there is a tie, use the line number

Parameters

• \HH\ParseTree $json
• string $method_name
• int $line_number

Returns

• MethodParametersNode