method Node.isIndexSignatureDeclarationimport { Node } from "https://dotland.deno.dev/x/ts_morph@15.1.0/ts_morph.d.ts"; isIndexSignatureDeclaration(node: Node | undefined): node is IndexSignatureDeclarationGets if the node is a IndexSignatureDeclaration. Gets if the node is a IndexSignatureDeclaration. Parametersnode: Node | undefined Node to check. Returnsnode is IndexSignatureDeclaration