You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: project.go
    path of file: ./repos/cockroach/pkg/sql/opt/ordering
    
    the code of the file until where you have to start completion: // Copyright 2018 The Cockroach Authors.
//
// Use of this software is governed by the Business Source License
// included in the file licenses/BSL.txt.
//
// As of the Change Date specified in that file, in accordance with
// the 
    
func projectCanProvideOrdering(expr memo.RelExpr, required *props.OrderingChoice) bool {
	// Project can pass through its ordering if the ordering depends only on
	// columns present in the input.
	proj := expr.(*memo.ProjectExpr)
	inputCols := proj.Input.Relational().OutputCols

	// Use a simplified ordering if it exists. This must be kept consistent with
	// projectBuildChildReqOrdering, which always simplifies the ordering if
	// possible.
	simplified := *required
	if fdSet := proj.InternalFDs(); simplified.CanSimplify(fdSet) {
		simplified = required.Copy()
		simplified.Simplify(fdSet)
	}
	return simplified.CanProjectCols(inputCols)
}