method Node.isIndexSignatureDeclarationimport { Node } from "https://dotland.deno.dev/x/fresh@1.7.3/src/dev/deps.ts"; isIndexSignatureDeclaration(node: Node | undefined): node is IndexSignatureDeclarationGets if the node is a IndexSignatureDeclaration. Gets if the node is a IndexSignatureDeclaration. Parametersnode: Node | undefinedReturnsnode is IndexSignatureDeclaration