method Node.isFunctionTypeNodeimport { Node } from "https://dotland.deno.dev/x/fresh@1.6.8/src/dev/deps.ts"; isFunctionTypeNode(node: Node | undefined): node is FunctionTypeNodeGets if the node is a FunctionTypeNode. Gets if the node is a FunctionTypeNode. Parametersnode: Node | undefinedReturnsnode is FunctionTypeNode