Function FunctionDeclaration

tools/acorn-optimizer.mjs:278–285

(node, _c)

          }
        },
        FunctionDeclaration(node, _c) {
          if (names.has(node.id.name)) {
            removed++;
            emptyOut(node);
            return;
          }
          // do not recurse into other scopes
        },
        // do not recurse into other scopes
        FunctionExpression() {},
        ArrowFunctionExpression() {},