Layer Estimates:

Layer: FieldMapFeatureClass (ID:0)
Count: 175
Extent:

XMin: -20037507.8427882
YMin: -30240971.4583861
XMax: 20037507.8427882
YMax: 30240971.4583861
Spatial Reference: 102100 (3857)

Layer: FieldMapsTable (ID:4)
Count: 1