fix: 改错了

src/core/logic/logic.layout.js

@@ -50,7 +50,7 @@ BI.VerticalLayoutLogic = BI.inherit(BI.Logic, {
             verticalAlign: o.verticalAlign,
             columnSize: o.columnSize,
             rowSize: o.rowSize
-        }, BI._identity);
+        }, BI._.identity);
     }
 });
 
@@ -107,7 +107,7 @@ BI.HorizontalLayoutLogic = BI.inherit(BI.Logic, {
             verticalAlign: o.verticalAlign,
             columnSize: o.columnSize,
             rowSize: o.rowSize
-        }, BI._identity);
+        }, BI._.identity);
     }
 });
 
@@ -157,7 +157,7 @@ BI.TableLayoutLogic = BI.inherit(BI.Logic, {
             verticalAlign: o.verticalAlign,
             columnSize: o.columnSize,
             rowSize: o.rowSize
-        }, BI._identity);
+        }, BI._.identity);
     }
 });
 
@@ -216,6 +216,6 @@ BI.HorizontalFillLayoutLogic = BI.inherit(BI.Logic, {
             verticalAlign: o.verticalAlign,
             columnSize: columnSize,
             rowSize: o.rowSize
-        }, BI._identity);
+        }, BI._.identity);
     }
 });