Function require_resources 

pub fn require_resources(
    rsp: &mut RunFunctionResponse,
    name: impl Into<String>,
    api_version: impl Into<String>,
    kind: impl Into<String>,
    match: Option<ResourceMatch>,
    namespace: Option<String>,
)

Adds a resource requirement to the response.

Crossplane fetches the matching resources and calls the function again with them in req.required_resources[name]. Matching None selects all resources of the given API version and kind. Omit the namespace to match cluster scoped resources, or to match namespaced resources by labels across all namespaces.